Set component=static_library for ASan builds on Mac.

BUG=145503
Review URL: https://chromiumcodereview.appspot.com/10898037

git-svn-id: http://src.chromium.org/svn/trunk/src/build@153911 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

common.gypi

@@ -1205,7 +1205,10 @@
         # plugins now.
         'clang_use_chrome_plugins%': 0,
       }],
-
+      ['asan==1 and OS=="mac"', {
+        # See http://crbug.com/145503.
+        'component': "static_library",
+      }],
       ['tsan==1', {
         'clang%': 1,
       }],