Move TargetAsmParser.h TargetAsmBackend.h and TargetAsmLexer.h to MC where they belong.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135833 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86AsmBackend.cpp b/lib/Target/X86/X86AsmBackend.cpp
index 9b556a5..d963f33 100644
--- a/lib/Target/X86/X86AsmBackend.cpp
+++ b/lib/Target/X86/X86AsmBackend.cpp
@@ -7,7 +7,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/Target/TargetAsmBackend.h"
+#include "llvm/MC/TargetAsmBackend.h"
 #include "X86.h"
 #include "X86FixupKinds.h"
 #include "llvm/ADT/Twine.h"
@@ -26,7 +26,6 @@
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/Target/TargetRegistry.h"
-#include "llvm/Target/TargetAsmBackend.h"
 using namespace llvm;
 
 // Option to allow disabling arithmetic relaxation to workaround PR9807, which