Move some flag-like props from GlobalContext and TargetLowering to ClFlags.

unittest/BitcodeMunge.cpp

Index: unittest/BitcodeMunge.cpp
diff --git a/unittest/BitcodeMunge.cpp b/unittest/BitcodeMunge.cpp
index 2b7b91837c6fe9b83a5f4a6aeefd76cef1195383..fd7100ca74dad7f997e2d8b6f3d55b4edffdff18 100644
--- a/unittest/BitcodeMunge.cpp
+++ b/unittest/BitcodeMunge.cpp
@@ -28,10 +28,11 @@ bool IceTest::SubzeroBitcodeMunger::runTest(const char *TestName,
   Ice::ClFlags Flags;
   Flags.setAllowErrorRecovery(true);
   Flags.setGenerateUnitTestMessages(true);
+  Flags.setOptLevel(Ice::Opt_m1);
   Flags.setOutFileType(Ice::FT_Iasm);
-  Ice::GlobalContext Ctx(DumpStream, DumpStream, nullptr,
-                         Ice::IceV_Instructions, Ice::Target_X8632, Ice::Opt_m1,
-                         "", Flags);
+  Flags.setTargetArch(Ice::Target_X8632);
+  Flags.setVerbose(Ice::IceV_Instructions);
+  Ice::GlobalContext Ctx(DumpStream, DumpStream, nullptr, Flags);
   Ice::PNaClTranslator Translator(&Ctx);
   Translator.translateBuffer(TestName, MungedInput.get());