Add support for VCCLCompilerTool EnableEnhancedInstructionSet setting.

R=scottmg@chromium.org

Review URL: https://codereview.chromium.org/195283002

git-svn-id: http://gyp.googlecode.com/svn/trunk@1865 78cadc50-ecff-11dd-a971-7dbc132099af
Disable gyptest-link-dependency.py for cmake, make it pass with ninja/win

See https://codereview.chromium.org/177043010/#msg15 for the cmake bit, and
the following comments for ninja/win.

R=scottmg@chromium.org
TBR=scottmg@chromium.org

Review URL: https://codereview.chromium.org/194983003

git-svn-id: http://gyp.googlecode.com/svn/trunk@1866 78cadc50-ecff-11dd-a971-7dbc132099af
Introduce a helper module TestMac

Many tests have to check the version of Xcode (as new versions introduce
incompatibilities) so introduce a module TestMac with a singleton object
to help get information about Xcode via xcodebuild.

Move binary architecture introspection into the TestMac module as this
is shared between Mac OS X and iOS unit tests.

BUG=gyp:414
R=mark@chromium.org

Review URL: https://codereview.chromium.org/195023004

git-svn-id: http://gyp.googlecode.com/svn/trunk@1867 78cadc50-ecff-11dd-a971-7dbc132099af
Disable test/mac/gyptest-objc-gc.py when using Xcode 5.1

Xcode 5.1 removed support for garbage collection, and no longer recognize
the GCC_ENABLE_OBJC_GC settings, so disable the corresponding test.

BUG=gyp:414
R=mark@chromium.org

Review URL: https://codereview.chromium.org/196973002

git-svn-id: http://gyp.googlecode.com/svn/trunk@1868 78cadc50-ecff-11dd-a971-7dbc132099af
Fix test/mac/gyptest-strip.py with Xcode 5.0 or higher

The version of clang that ships with Xcode 5.0 and higher add an extra
symbol if the command-line use a relative path with more than one
component to reference the source file (like ./file.c). This extra
symbol is not present if using an absolute path to the file, and cause
a difference of behaviour between xcodebuild and ninja.

Account for the extra symbol in the un-stripped binaries when building
with ninja and using Xcode 5.0 or higher. A possible alternative would
be to always use absolute path with ninja, but it would make the build
environment non-relocatable.

BUG=gyp:381
R=mark@chromium.org

Review URL: https://codereview.chromium.org/197073002

git-svn-id: http://gyp.googlecode.com/svn/trunk@1869 78cadc50-ecff-11dd-a971-7dbc132099af