[DWARF] Fix debug info generation for function static variables, typedefs, and records

Function static variables, typedefs and records (class, struct or union) declared inside
a lexical scope were associated with the function as their parent scope, rather than the
lexical scope they are defined or declared in.

This fixes PR19238

Patch by: amjad.aboud@intel.com
Differential Revision: http://reviews.llvm.org/D9758

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241153 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/ADT/iterator_range.h

@@ -53,4 +53,7 @@ template <typename T> iterator_range<T> make_range(std::pair<T, T> p) {
 }
 }
 
+template <typename R>
+bool empty(const R& r) { return begin(r) == end(r); }
+
 #endif