Change location information for synthesized properties to be at the
property file/line rather than the @synthesize file/line. Avoids
some nasty confusing-ness with conflating the file from the scope
and the line from the original declaration. Use    the current scope
location as a separate parameter so that we can    match it up
better in the line table with the beginning of the scope.

Update a couple of testcases accordingly since I had to change
that we actually use the passed in location in EmitFunctionStart
and for the new metadata parameter and add a new testcase to
make sure we've got the right line numbers for synthesized
properties.

Part of rdar://11026482

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@153917 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGenCXX/debug-info-artificial-arg.cpp b/test/CodeGenCXX/debug-info-artificial-arg.cpp
index 3806a1f..92d1b16 100644
--- a/test/CodeGenCXX/debug-info-artificial-arg.cpp
+++ b/test/CodeGenCXX/debug-info-artificial-arg.cpp
@@ -25,6 +25,6 @@
 // FIXME: The numbers are truly awful.
 // CHECK: !18 = metadata !{i32 {{.*}}, i32 0, metadata !"", i32 0, i32 0, i64 64, i64 64, i64 0, i32 64, metadata !19} ; [ DW_TAG_pointer_type ]
 // CHECK: !19 = metadata !{i32 {{.*}}, null, metadata !"A", metadata !6, i32 8, i64 128, i64 64, i32 0, i32 0, null, metadata !20, i32 0, metadata !19, null} ; [ DW_TAG_class_type ]
-// CHECK: metadata !19, metadata !"A", metadata !"A", metadata !"", metadata !6, i32 12, metadata !45, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 false, null, null, i32 0, metadata !47} ; [ DW_TAG_subprogram ]
+// CHECK: metadata !19, metadata !"A", metadata !"A", metadata !"", metadata !6, i32 12, metadata !45, i1 false, i1 false, i32 0, i32 0, null, i32 256, i1 false, null, null, i32 0, metadata !47, i32 12} ; [ DW_TAG_subprogram ]
 // CHECK: metadata !"", i32 0, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !46, i32 0, i32 0} ; [ DW_TAG_subroutine_type ]
 // CHECK: !46 = metadata !{null, metadata !18, metadata !9, metadata !34}