[Object, DebugInfo] Make DWARFContext BE-aware.

test/DebugInfo/member-pointers.ll would not fail in targetting BE any more.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171943 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/DebugInfo/DWARFContext.cpp b/lib/DebugInfo/DWARFContext.cpp
index d6d9fcf..247ee5b 100644
--- a/lib/DebugInfo/DWARFContext.cpp
+++ b/lib/DebugInfo/DWARFContext.cpp
@@ -352,7 +352,7 @@
 }
 
 DWARFContextInMemory::DWARFContextInMemory(object::ObjectFile *Obj) :
-  IsLittleEndian(true /* FIXME */) {
+  IsLittleEndian(Obj->isLittleEndian()) {
   error_code ec;
   for (object::section_iterator i = Obj->begin_sections(),
          e = Obj->end_sections();