Hotfix to make clang-by-default work with gcc 4.8

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index 44ef70aa8d9303ec53b65c55a2818808c5aa1489..8e09b007ec1403f12786369637f109e957d0a739 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -4181,7 +4181,7 @@
               # gcc -- http://gcc.gnu.org/onlinedocs/gcc-4.8.0/gcc/Optimize-Options.html
               # TODO(mithro): Watch for clang support at following thread:
               # http://clang-developers.42468.n3.nabble.com/Adding-fuse-ld-support-to-clang-td4032180.html
-              ['gcc_version>=48', {
+              ['gcc_version>=48 and clang==0', {
                 'target_conditions': [
                   ['_toolset=="target"', {
                     'ldflags': [
@@ -4190,7 +4190,7 @@
                   }],
                 ],
               }],
-              ['host_gcc_version>=48', {
+              ['host_gcc_version>=48 and clang==0', {
                 'target_conditions': [
                   ['_toolset=="host"', {
                     'ldflags': [
@@ -4228,7 +4228,7 @@
               '-Wl,--disable-new-dtags',
             ],
           }],
-          ['gcc_version>=48', {
+          ['gcc_version>=48 and clang==0', {
             'target_conditions': [
               ['_toolset=="target"', {
                 'cflags_cc': [
@@ -4241,7 +4241,7 @@
               }],
             ],
           }],
-          ['host_gcc_version>=48', {
+          ['host_gcc_version>=48 and clang==0', {
             'target_conditions': [
               ['_toolset=="host"', {
                 'cflags_cc': [
@@ -5475,7 +5475,7 @@
     # Don't warn about the "typedef 'foo' locally defined but not used"
     # for gcc 4.8.
     # TODO: remove this flag once all builds work. See crbug.com/227506
-    ['gcc_version>=48', {
+    ['gcc_version>=48 and clang==0', {
       'target_defaults': {
         'cflags': [
           '-Wno-unused-local-typedefs',