[LLVM-C] Fix name mangling on AggressiveInstCombine

[mhlindstr]

Summary

Similarly to rL336736, at least one more C API function does not properly get declared as extern "C" due to a missing header, causing name mangling and linking errors. This patch fixes calls to LLVMAddAggressiveInstCombinerPass().

[whitequark]

LGTM

[mhlindstr]

I do not have write access to the repository, can someone else land this?

Thanks again!

llvm/trunk/lib/Transforms/AggressiveInstCombine/AggressiveInstCombine.cpp

 // Currently, it handles expression patterns for:
 //  * Truncate instruction
 //
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Transforms/AggressiveInstCombine/AggressiveInstCombine.h"
 #include "AggressiveInstCombineInternal.h"
 #include "llvm-c/Initialization.h"
+#include "llvm-c/Transforms/Scalar.h"
 #include "llvm/Analysis/AliasAnalysis.h"
 #include "llvm/Analysis/BasicAliasAnalysis.h"
 #include "llvm/Analysis/GlobalsModRef.h"
 #include "llvm/Analysis/TargetLibraryInfo.h"
 #include "llvm/IR/DataLayout.h"
 #include "llvm/IR/Dominators.h"
 #include "llvm/IR/IRBuilder.h"
 #include "llvm/IR/LegacyPassManager.h"