Makefile: don't force -Dv8_optimized_debug=0 unnecessarily

R=machenbach@chromium.org

Review URL: https://codereview.chromium.org/170243003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19470 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Makefile

@@ -393,7 +393,7 @@ $(OUT_MAKEFILES): $(GYPFILES) $(ENVFILE)
 	build/gyp/gyp --generator-output="$(OUTDIR)" build/all.gyp \
 	              -Ibuild/standalone.gypi --depth=. \
 	              -Dv8_target_arch=$(subst .,,$(suffix $(basename $@))) \
-	              -Dv8_optimized_debug=$(if $(findstring optdebug,$@),2,0) \
+	              $(if $(findstring optdebug,$@),-Dv8_optimized_debug=2,) \
 	              -S$(suffix $(basename $@))$(suffix $@) $(GYPFLAGS)
 
 $(OUTDIR)/Makefile.native: $(GYPFILES) $(ENVFILE)