Don't pass -x flag to gcc when it's know that gcc will select the

same language from the file extension. This works around distcc's dislike
of the -x option: whenever it sees it, it resorts to local compilation.


[SVN r21839]

tools/build

@@ -1 +1 @@
-Subproject commit 87f709e5a30302733ac6b2f28e1b7aff7fe98248
+Subproject commit 1671d608479a58c1c089b567ac08019b97d37dd1