Use -fasan together with -faddress-sanitizer in nacl.gypi as well.

TBR=thakis
Review URL: http://codereview.chromium.org/8472006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@110925 0039d316-1c4b-4281-b951-d872f2087c98

chrome/nacl.gypi

@@ -242,7 +242,9 @@
                 '-fno-pie', '-fno-PIE',
               ],
               'cflags!': [
+	        # TODO(glider): -fasan is deprecated.
                 '-fasan',
+		'-faddress-sanitizer',
                 '-w',
               ],
               'conditions': [