Set the compiler root directory for the Android NDK, merging two linker flags.

build/common.gypi

 # Copyright (c) 2011 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 2093 matching lines @@
               # Manually link the libgcc.a that the cross compiler uses.
               '<!($CROSS_CC -print-libgcc-file-name)',
               '-lc',
               '-ldl',
               '-lstdc++',
               '-lm',
             ],
             'conditions': [
               ['android_build_type==0', {
                 'ldflags': [
-                  '-Wl,-rpath-link=<(android_ndk_lib)',
-                  '-L<(android_ndk_lib)',
+                  '--sysroot=<(android_ndk_sysroot)',
                 ],
               }],
               # NOTE: The stlport header include paths below are specified in
               # cflags rather than include_dirs because they need to come
               # after include_dirs. Think of them like system headers, but
               # don't use '-isystem' because the arm-linux-androideabi-4.4.3
               # toolchain (circa Gingerbread) will exhibit strange errors.
               # The include ordering here is important; change with caution.
               ['use_system_stlport==0', {
                 'cflags': [
@@ skipping 540 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }