Fix the Archive::Child::getRawSize() method used by llvm-objdump’s -archive-headers option

and tweak its use in llvm-objdump.  Add back the test case for the -archive-headers option.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226332 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Object/Archive.cpp

@@ -111,7 +111,7 @@ uint64_t Archive::Child::getSize() const {
 }
 
 uint64_t Archive::Child::getRawSize() const {
-  return Data.size();
+  return getHeader()->getSize();
 }
 
 Archive::Child Archive::Child::getNext() const {