Add triple for RHEL 5 to the libpath collecting logic.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@141887 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/ToolChains.cpp b/lib/Driver/ToolChains.cpp
index bb19173..1edb56a 100644
--- a/lib/Driver/ToolChains.cpp
+++ b/lib/Driver/ToolChains.cpp
@@ -1664,6 +1664,7 @@
         "i686-pc-linux-gnu",
         "i486-linux-gnu",
         "i686-redhat-linux",
+        "i386-redhat-linux",
         "i586-suse-linux",
         "i486-slackware-linux"
       };