Turn on more warnings during CleanSpec processing

We don't want these to be warnings, may as well be errors instead of
turning off the warnings.

Bug: 123583617
Test: treehugger
Change-Id: I6ca518c9647e712426952cb88bdb044d933b23f2

ui/build/kati.go

@@ -202,8 +202,11 @@ func runKatiCleanSpec(ctx Context, config Config) {
 	defer ctx.EndTrace()
 
 	runKati(ctx, config, katiCleanspecSuffix, []string{
+		"--werror_writable",
 		"--werror_implicit_rules",
 		"--werror_overriding_commands",
+		"--werror_real_to_phony",
+		"--werror_phony_looks_real",
 		"-f", "build/make/core/cleanbuild.mk",
 		"SOONG_MAKEVARS_MK=" + config.SoongMakeVarsMk(),
 		"TARGET_DEVICE_DIR=" + config.TargetDeviceDir(),