fix a bunch of comment typos found by codespell.  Patch by
Luis Felipe Strano Moraes!

llvm-svn: 129559
diff --git a/clang/lib/Driver/ToolChain.cpp b/clang/lib/Driver/ToolChain.cpp
index 06998a5..63a11aa 100644
--- a/clang/lib/Driver/ToolChain.cpp
+++ b/clang/lib/Driver/ToolChain.cpp
@@ -47,7 +47,7 @@
   return false;
 }
 
-/// getARMTargetCPU - Get the (LLVM) name of the ARM cpu we are targetting.
+/// getARMTargetCPU - Get the (LLVM) name of the ARM cpu we are targeting.
 //
 // FIXME: tblgen this.
 static const char *getARMTargetCPU(const ArgList &Args,