x86_64 now uses the correct ELF e_machine type

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72986 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ELFWriterInfo.cpp b/lib/Target/X86/X86ELFWriterInfo.cpp
index 4c3cc82..2604741 100644
--- a/lib/Target/X86/X86ELFWriterInfo.cpp
+++ b/lib/Target/X86/X86ELFWriterInfo.cpp
@@ -14,5 +14,6 @@
 #include "X86ELFWriterInfo.h"
 using namespace llvm;
 
-X86ELFWriterInfo::X86ELFWriterInfo() : TargetELFWriterInfo(EM_386) {}
+X86ELFWriterInfo::X86ELFWriterInfo(bool is64Bit) :
+  TargetELFWriterInfo(is64Bit ? EM_X86_64 : EM_386) {}
 X86ELFWriterInfo::~X86ELFWriterInfo() {}