Build fix: no gold on any ChromeOS build.

On a Google-internal ChromeOS builder make seems to exit with a
failure code no error message I can identify.

git-svn-id: http://src.chromium.org/svn/trunk/src/build@121264 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

common.gypi

@@ -389,18 +389,14 @@
 
         # linux_use_gold_binary: whether to use the binary checked into
         # third_party/gold.
-        ['host_arch=="x64"', {
-          'linux_use_gold_binary%': 1,
-        }, {
-          'linux_use_gold_binary%': 0,
-        }],
-
         # linux_use_gold_flags: whether to use build flags that rely on gold.
         # On by default for x64 Linux.  Temporarily off for ChromeOS as
         # it failed on a buildbot.
         ['host_arch=="x64" and chromeos==0', {
+          'linux_use_gold_binary%': 1,
           'linux_use_gold_flags%': 1,
         }, {
+          'linux_use_gold_binary%': 0,
           'linux_use_gold_flags%': 0,
         }],