[Android]: Update Arm64 and x86_64 build targets to use the experimental ndk.

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index f244e2a041200f9acdecb54c189a7a08f048251d..3491280aca05276e6fe36a793b8c23303889967b 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -1476,6 +1476,7 @@
             # they're passed to ant which uses a different relative path from
             # gyp.
             'android_ndk_root%': '<!(cd <(DEPTH) && pwd -P)/third_party/android_tools/ndk/',
+            'android_ndk_experimental_root%': '<!(cd <(DEPTH) && pwd -P)/third_party/android_tools/ndk_experimental/',
             'android_sdk_root%': '<!(cd <(DEPTH) && pwd -P)/third_party/android_tools/sdk/',
             'android_host_arch%': '<!(uname -m)',
             # Android API-level of the SDK used for compilation.
@@ -1500,17 +1501,16 @@
           'conditions': [
             ['target_arch == "ia32"', {
               'android_app_abi%': 'x86',
-              'android_gdbserver_executable%': 'gdbserver',
               'android_gdbserver%': '<(android_ndk_root)/prebuilt/android-x86/gdbserver/gdbserver',
               'android_ndk_sysroot%': '<(android_ndk_root)/platforms/android-14/arch-x86',
               'android_toolchain%': '<(android_ndk_root)/toolchains/x86-4.6/prebuilt/<(host_os)-<(android_host_arch)/bin',
             }],
             ['target_arch == "x64"', {
               'android_app_abi%': 'x86_64',
-              'android_gdbserver_executable%': 'gdbserver64',
-              'android_gdbserver%': '<(android_ndk_root)/prebuilt/android-x86_64/gdbserver/gdbserver64',
-              'android_ndk_sysroot%': '<(android_ndk_root)/platforms/android-19/arch-x86_64',
-              'android_toolchain%': '<(android_ndk_root)/toolchains/x86_64-4.8/prebuilt/<(host_os)-<(android_host_arch)/bin',
+              'android_gdbserver%': '<(android_ndk_experimental_root)/prebuilt/android-x86_64/gdbserver/gdbserver',
+              'android_ndk_sysroot%': '<(android_ndk_experimental_root)/platforms/android-20/arch-x86_64',
+              'android_toolchain%': '<(android_ndk_experimental_root)/toolchains/x86_64-4.8/prebuilt/<(host_os)-<(android_host_arch)/bin',
+              'android_stlport_root': '<(android_ndk_experimental_root)/sources/cxx-stl/stlport',
             }],
             ['target_arch=="arm"', {
               'conditions': [
@@ -1520,21 +1520,19 @@
                   'android_app_abi%': 'armeabi-v7a',
                 }],
               ],
-              'android_gdbserver_executable%': 'gdbserver',
               'android_gdbserver%': '<(android_ndk_root)/prebuilt/android-arm/gdbserver/gdbserver',
               'android_ndk_sysroot%': '<(android_ndk_root)/platforms/android-14/arch-arm',
               'android_toolchain%': '<(android_ndk_root)/toolchains/arm-linux-androideabi-4.6/prebuilt/<(host_os)-<(android_host_arch)/bin',
             }],
             ['target_arch == "arm64"', {
               'android_app_abi%': 'arm64-v8a',
-              'android_gdbserver_executable%': 'gdbserver64',
-              'android_gdbserver%': '<(android_ndk_root)/prebuilt/android-arm64/gdbserver64/gdbserver64',
-              'android_ndk_sysroot%': '<(android_ndk_root)/platforms/android-19/arch-arm64',
-              'android_toolchain%': '<(android_ndk_root)/toolchains/aarch64-linux-android-4.8/prebuilt/<(host_os)-<(android_host_arch)/bin',
+              'android_gdbserver%': '<(android_ndk_experimental_root)/prebuilt/android-arm64/gdbserver/gdbserver',
+              'android_ndk_sysroot%': '<(android_ndk_experimental_root)/platforms/android-20/arch-arm64',
+              'android_toolchain%': '<(android_ndk_experimental_root)/toolchains/aarch64-linux-android-4.8/prebuilt/<(host_os)-<(android_host_arch)/bin',
+              'android_stlport_root': '<(android_ndk_experimental_root)/sources/cxx-stl/stlport',
             }],
             ['target_arch == "mipsel"', {
               'android_app_abi%': 'mips',
-              'android_gdbserver_executable%': 'gdbserver',
               'android_gdbserver%': '<(android_ndk_root)/prebuilt/android-mips/gdbserver/gdbserver',
               'android_ndk_sysroot%': '<(android_ndk_root)/platforms/android-14/arch-mips',
               'android_toolchain%': '<(android_ndk_root)/toolchains/mipsel-linux-android-4.6/prebuilt/<(host_os)-<(android_host_arch)/bin',
@@ -1543,7 +1541,6 @@
         },
         # Copy conditionally-set variables out one scope.
         'android_app_abi%': '<(android_app_abi)',
-        'android_gdbserver_executable': '<(android_gdbserver_executable)',
         'android_gdbserver%': '<(android_gdbserver)',
         'android_ndk_root%': '<(android_ndk_root)',
         'android_ndk_sysroot%': '<(android_ndk_sysroot)',