Pass isDefined parameter to createGlobalVariableExpression()

Author: nikic

src/rustllvm/RustWrapper.cpp

@@ -827,6 +827,9 @@ extern "C" LLVMMetadataRef LLVMRustDIBuilderCreateStaticVariable(
   llvm::DIGlobalVariableExpression *VarExpr = Builder->createGlobalVariableExpression(
       unwrapDI<DIDescriptor>(Context), Name, LinkageName,
       unwrapDI<DIFile>(File), LineNo, unwrapDI<DIType>(Ty), IsLocalToUnit,
+#if LLVM_VERSION_GE(10, 0)
+      /* isDefined */ true,
+#endif
       InitExpr, unwrapDIPtr<MDNode>(Decl),
 #if LLVM_VERSION_GE(8, 0)
       /* templateParams */ nullptr,