Updated Clang to a version that supports propagating
the "virtual" flag when importing a C++ function
declaration.  Made changes to LLDB to support other
changes in Clang.

llvm-svn: 124355
diff --git a/lldb/source/Expression/ASTResultSynthesizer.cpp b/lldb/source/Expression/ASTResultSynthesizer.cpp
index e581b96..7dd1ab4 100644
--- a/lldb/source/Expression/ASTResultSynthesizer.cpp
+++ b/lldb/source/Expression/ASTResultSynthesizer.cpp
@@ -290,7 +290,7 @@
         (last_expr->getObjectKind() == OK_Ordinary);
     
     QualType expr_qual_type = last_expr->getType();
-    clang::Type *expr_type = expr_qual_type.getTypePtr();
+    const clang::Type *expr_type = expr_qual_type.getTypePtr();
     
     if (!expr_type)
         return false;