mac: Fix building with xcodebuild on Xcode4.4

See the bug for details.

BUG=156530

Review URL: https://codereview.chromium.org/11184054

git-svn-id: http://src.chromium.org/svn/trunk/src/build@162859 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

common.gypi

@@ -2976,6 +2976,8 @@
         'mac_bundle': 0,
         'xcode_settings': {
           'ALWAYS_SEARCH_USER_PATHS': 'NO',
+          # Don't link in libarclite_macosx.a, see http://crbug.com/156530.
+          'CLANG_LINK_OBJC_RUNTIME': 'NO',          # -fno-objc-link-runtime
           'GCC_C_LANGUAGE_STANDARD': 'c99',         # -std=c99
           'GCC_CW_ASM_SYNTAX': 'NO',                # No -fasm-blocks
           'GCC_ENABLE_CPP_EXCEPTIONS': 'NO',        # -fno-exceptions