Really disable clang's SLP vectorizer on Linux.

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index db01f93e0664e2469b03eff81e6dc1c8e1a7b1c4..77439eb53e87d1d1e6eb9ffddca3526b34abf9e2 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -3542,6 +3542,9 @@
                 'cflags!': [
                   '-fno-ident',
                 ],
+                # TODO(thakis): Remove once http://llvm.org/PR20354 is fixed
+                # and the fix is in chromium.
+                'cflags': [ '-fno-slp-vectorize', ],
               }],
               ['profiling==1', {
                 'cflags': [
@@ -3902,10 +3905,6 @@
               # code generated by flex (used in angle) contains that keyword.
               # http://crbug.com/255186
               '-Wno-deprecated-register',
-
-              # TODO(thakis): Remove once http://llvm.org/PR20354 is fixed
-              # and the fix is in chromium.
-              '-fno-slp-vectorize',
             ],
             'cflags!': [
               # Clang doesn't seem to know know this flag.