Fix for missing ASAN stack frames.

Review URL: http://codereview.chromium.org/8999013

git-svn-id: http://src.chromium.org/svn/trunk/src/build@115347 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

common.gypi

@@ -1983,6 +1983,7 @@
           ['asan==1', {
             'cflags': [
               '-faddress-sanitizer',
+              '-fno-omit-frame-pointer',
               '-w',
             ],
             'ldflags': [