Suppress possible error from ulimit not having -c or being missing.

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@8634 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

configure

@@ -1196,7 +1196,7 @@ strip="${cross_prefix}${strip}"
 
 # Disable core dumps so that intentional execution of broken apps doesn't
 # pollute the current directory.
-ulimit -c 0
+ulimit -c 0 >/dev/null 2>&1
 
 # we need to build at least one lib type
 if disabled_all static shared; then