Add driver support for fedora 18 on ARM.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@179484 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/ToolChains.cpp b/lib/Driver/ToolChains.cpp
index e9cb1f8..36ff722 100644
--- a/lib/Driver/ToolChains.cpp
+++ b/lib/Driver/ToolChains.cpp
@@ -1086,6 +1086,7 @@
   };
   static const char *const ARMHFTriples[] = {
     "arm-linux-gnueabihf",
+    "armv7hl-redhat-linux-gnueabi"
   };
 
   static const char *const X86_64LibDirs[] = { "/lib64", "/lib" };