After r138010, subroutine type does not have context info. Update type verifier accordingly.
This fixes ptype.exp gdb testsuite regressions.

llvm-svn: 138869
diff --git a/llvm/lib/Analysis/DebugInfo.cpp b/llvm/lib/Analysis/DebugInfo.cpp
index 7935fad..b050227 100644
--- a/llvm/lib/Analysis/DebugInfo.cpp
+++ b/llvm/lib/Analysis/DebugInfo.cpp
@@ -367,6 +367,7 @@
       Tag != dwarf::DW_TAG_reference_type && Tag != dwarf::DW_TAG_restrict_type 
       && Tag != dwarf::DW_TAG_vector_type && Tag != dwarf::DW_TAG_array_type
       && Tag != dwarf::DW_TAG_enumeration_type 
+      && Tag != dwarf::DW_TAG_subroutine_type
       && getFilename().empty())
     return false;
   return true;