rename PrettyStackTraceDecl -> PrettyStackTraceActionsDecl.
Introduce a new PrettyStackTraceDecl.
Use it to add the top level LLVM IR generation stuff in 
Backend.cpp to stack traces.  We now get crashes like:

Stack dump:
0.	Program arguments: clang t.c -emit-llvm 
1.	<eof> parser at end of file
2.	t.c:1:5: LLVM IR generation of declaration 'a'
Abort

for IR generation crashes.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@66153 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/MinimalAction.cpp b/lib/Parse/MinimalAction.cpp
index 3b8694c..41ad36c 100644
--- a/lib/Parse/MinimalAction.cpp
+++ b/lib/Parse/MinimalAction.cpp
@@ -42,7 +42,7 @@
 }
 
 
-void PrettyStackTraceDecl::print(llvm::raw_ostream &OS) const {
+void PrettyStackTraceActionsDecl::print(llvm::raw_ostream &OS) const {
   if (Loc.isValid()) {
     Loc.print(OS, SM);
     OS << ": ";