Add .fragment and .sigs to non-compilable suffixes.

This fixes the shared build on Linux after r18122.

Review URL: http://codereview.chromium.org/123015

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@18365 0039d316-1c4b-4281-b951-d872f2087c98

site_scons/site_tools/chromium_builders.py

@@ -162,14 +162,16 @@ non_compilable_suffixes = {
         '.bdic',
         '.css',
         '.dat',
+        '.fragment',
         '.gperf',
         '.h',
         '.html',
         '.hxx',
         '.idl',
-        '.mk',
         '.js',
+        '.mk',
         '.rc',
+        '.sigs',
     ]),
     'WINDOWS' : set([
         '.h',