Keep "has debug info" big in MachineModuleInfo to avoid circular dependency between AsmPrinter and CodeGen.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62191 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/AsmPrinter/DwarfWriter.cpp

@@ -3604,6 +3604,7 @@ public:
 
       MMI = mmi;
       shouldEmit = true;
+      MMI->setDebugInfoAvailability(true);
 
       // Create DIEs for each of the externally visible global variables.
       ConstructGlobalVariableDIEs();