Globally set LC_ALL=C to prevent locale issues from breaking tests.

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@15511 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

configure

@@ -7,6 +7,10 @@
 # Copyright (c) 2005-2006 Mans Rullgard
 #
 
+# Prevent locale nonsense from breaking basic text processing.
+LC_ALL=C
+export LC_ALL
+
 # make sure we are running under a compatible shell
 # try to make this part work with most shells