Bug 491325 - Fix warning during builds: "cat: dummy-hello.s: No such file or directory"; (Bv1-CC) Copy it to comm-central.

r=Callek.

configure.in

@@ -6357,7 +6357,7 @@ if test -n "$GNU_CC" && test -n "$GNU_CXX" && test -n "$GNU_AS"; then
     echo '#include <stdio.h>' > dummy-hello.c
     echo 'int main() { printf("Hello World\n"); exit(0); }' >> dummy-hello.c
     ${CC} -S dummy-hello.c -o dummy-hello.s 2>&5
-    cat dummy-hello.s | ${AS_BIN} -o dummy-hello.S - 2>&5
+    cat dummy-hello.s 2> /dev/null | ${AS_BIN} -o dummy-hello.S - 2>&5
     if test $? = 0; then
         _res_as_stdin="yes"
     else