Enhance basic store to also lazily symbolicate VarRegions
with an 'unknown' memory space.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@98110 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Checker/BasicStore.cpp b/lib/Checker/BasicStore.cpp
index d93a665..10136f3 100644
--- a/lib/Checker/BasicStore.cpp
+++ b/lib/Checker/BasicStore.cpp
@@ -142,7 +142,8 @@
 
   // Globals and parameters start with symbolic values.
   // Local variables initially are undefined.
-  if (VR->hasGlobalsOrParametersStorage())
+  if (VR->hasGlobalsOrParametersStorage() ||
+      isa<UnknownSpaceRegion>(VR->getMemorySpace()))
     return ValMgr.getRegionValueSymbolVal(R);
   return UndefinedVal();
 }