Use the %llvm-gcc% variable to find llvm-gcc for those of us that don't

have it in our path and to ensure it uses the configured llvm-gcc not just
any one randomly placed in the path.

llvm-svn: 29522

test/Regression/CFrontend/2006-07-31-PR854.c

@@ -1,4 +1,4 @@
-// RUN: llvm-gcc %s -S -o -
+// RUN: %llvmgcc% %s -S -o -
 // PR854
   struct kernel_symbol {
     unsigned long value;