[Android] Revert the NDK back to r10e.

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index a9c8f1ddefe7e811ae8472237beab9a075404911..1f39ae5b916e84ccde244a514cfe8715795c0c11 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -1726,7 +1726,7 @@
             'android_ndk_absolute_root%': '<!(cd <(DEPTH) && pwd -P)/third_party/android_tools/ndk/',
             'android_host_arch%': '<!(uname -m)',
             # Version of the NDK. Used to ensure full rebuilds on NDK rolls.
-            'android_ndk_version%': 'r11c',
+            'android_ndk_version%': 'r10e',

[Michael Achenbach, 2016/06/07 07:08:23]

We might need a better mechanism in v8 for this. We have an auto-roller that
automatically pulls in the new android_tools, but it doesn't automatically
change this version variable in our standalone.gypi.

Clang has a similar mechanism for rebuilding, but the version isn't hardcoded in
a config file, but comes from the repo that rolled. Could we get something
similar here too? E.g. a small config file in android_tools that holds this
version, letting this variable here point to the content of that file. On each
roll the file could be edited.

Otherwise we get incremental build breakages on each android roll/revert (just
got one).

[jbudorick, 2016/06/07 12:59:58]

Sure, I'll do something like that before the next roll.

             # Android API-level of the SDK used for compilation.
             'android_sdk_version%': '23',
             'android_sdk_build_tools_version%': '23.0.1',