Revert "Linux: Turn --icf=safe back on for the gold linker."

This broke the wtf_unittests when compiling with gcc:
http://build.chromium.org/p/chromium.webkit/builders/WebKit%20Linux%20%28dbg%29/builds/16904

TBR=cevans@chromium.org, thestig@chromium.org
BUG=

Review URL: https://codereview.chromium.org/139153005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245194 0039d316-1c4b-4281-b951-d872f2087c98

build/common.gypi

@@ -3634,7 +3634,12 @@
                 'target_conditions': [
                   ['_toolset=="target"', {
                     'ldflags': [
-                      '-Wl,--icf=safe',
+                      # There seems to be a conflict of --icf and -pie
+                      # in gold which can generate crashy binaries. As
+                      # a security measure, -pie takes precendence for
+                      # now.
+                      #'-Wl,--icf=safe',
+                      '-Wl,--icf=none',
                     ],
                   }],
                 ],