Refactor filename/directory in DICompileUnit into a DIFile

This is the next step towards making the metadata for DIScopes have a common
prefix rather than having to delegate based on their tag type.

llvm-svn: 176913
diff --git a/llvm/test/DebugInfo/2010-03-24-MemberFn.ll b/llvm/test/DebugInfo/2010-03-24-MemberFn.ll
index 40b82da..da86ea7 100644
--- a/llvm/test/DebugInfo/2010-03-24-MemberFn.ll
+++ b/llvm/test/DebugInfo/2010-03-24-MemberFn.ll
@@ -44,7 +44,7 @@
 !2 = metadata !{i32 786443, metadata !3, i32 3, i32 0} ; [ DW_TAG_lexical_block ]
 !3 = metadata !{i32 786478, i32 0, metadata !4, metadata !"bar", metadata !"bar", metadata !"_Z3barv", metadata !4, i32 3, metadata !6, i1 false, i1 true, i32 0, i32 0, null, i1 false, i32 ()* @_Z3barv, null, null, null, i32 3} ; [ DW_TAG_subprogram ]
 !4 = metadata !{i32 786473, metadata !"one.cc", metadata !"/tmp/", metadata !5} ; [ DW_TAG_file_type ]
-!5 = metadata !{i32 786449, i32 0, i32 4, metadata !"one.cc", metadata !"/tmp/", metadata !"4.2.1 (Based on Apple Inc. build 5658) (LLVM build)", i1 false, metadata !"", i32 0, null, null, metadata !24, null, metadata !""} ; [ DW_TAG_compile_unit ]
+!5 = metadata !{i32 786449, i32 0, i32 4, metadata !4, metadata !"4.2.1 (Based on Apple Inc. build 5658) (LLVM build)", i1 false, metadata !"", i32 0, null, null, metadata !24, null, metadata !""} ; [ DW_TAG_compile_unit ]
 !6 = metadata !{i32 786453, metadata !4, metadata !"", metadata !4, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !7, i32 0, null} ; [ DW_TAG_subroutine_type ]
 !7 = metadata !{metadata !8}
 !8 = metadata !{i32 786468, metadata !4, metadata !"int", metadata !4, i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]