Update gold linker to 2.23.1

This is the second attempt to integrate latest gold version.
The first time around there were crashes seen on 32-bit linux
hosts.  Disabling multi-threaded linking on 32-bit hosts
fixes the issue.


BUG=161942
NOTRY=true

Review URL: https://chromiumcodereview.appspot.com/11444012

git-svn-id: http://src.chromium.org/svn/trunk/src/build@171917 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

common.gypi

@@ -2808,14 +2808,19 @@
             ],
           }],
           ['linux_use_gold_flags==1', {
-            'ldflags': [
-              # Experimentation found that using four linking threads
-              # saved ~20% of link time.
-              # https://groups.google.com/a/chromium.org/group/chromium-dev/browse_thread/thread/281527606915bb36
-              '-Wl,--threads',
-              '-Wl,--thread-count=4',
-            ],
             'conditions': [
+              # Don't enable multi-threaded linking for 32-bit targets as it
+              # causes intermittent crashed on lucid32: http://crbug.com/161942
+              # TODO(sbc): remove this once gold bug is fixed
+              ['host_arch!="ia32"', {
+                'ldflags': [
+                  # Experimentation found that using four linking threads
+                  # saved ~20% of link time.
+                  # https://groups.google.com/a/chromium.org/group/chromium-dev/browse_thread/thread/281527606915bb36
+                  '-Wl,--threads',
+                  '-Wl,--thread-count=4',
+                ],
+              }],
               ['release_valgrind_build==0', {
                 'target_conditions': [
                   ['_toolset=="target"', {