Use additionnal include directory instead of ../ in #include.
Suggested by aKor.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55282 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/AsmPrinter/X86AsmPrinter.cpp b/lib/Target/X86/AsmPrinter/X86AsmPrinter.cpp
index ad4d12f..d616acc 100644
--- a/lib/Target/X86/AsmPrinter/X86AsmPrinter.cpp
+++ b/lib/Target/X86/AsmPrinter/X86AsmPrinter.cpp
@@ -16,7 +16,7 @@
 
 #include "X86ATTAsmPrinter.h"
 #include "X86IntelAsmPrinter.h"
-#include "../X86Subtarget.h"
+#include "X86Subtarget.h"
 using namespace llvm;
 
 /// createX86CodePrinterPass - Returns a pass that prints the X86 assembly code