[PATCH] Change clang driver to pass -target-abi option

[Daniel Sanders]

LGTM. The passing of -target-abi ought to be generic given that the backend handling is generic but this is still good as-is since it will silence the unknown feature warnings coming from the backend and fixing that is fairly urgent.


================
Comment at: lib/Driver/Tools.cpp:4868
@@ +4867,3 @@
+void ClangAs::AddMIPSTargetArgs(const ArgList &Args,
+                              ArgStringList &CmdArgs) const {
+  StringRef CPUName;
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Nit: Indentation

================
Comment at: lib/Driver/Tools.cpp:4985
@@ -4984,1 +4984,3 @@
 
+    // Add target specific flags.
+  switch(getToolChain().getArch()) {
----------------
Nit: Indentation

http://reviews.llvm.org/D6091

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