Split (ninja|soong).mk into config and rule portions

So that an external tool can read the configuration using
dump-many-vars, and write out the soong.variables file while only
loading config.mk.

Also remove dumpvar-% from PARSE_TIME_MAKE_GOALS, since it's only used
with CALLED_FROM_SETUP / config.mk. This provides an easy way to test
this change as well.

Test: get_build_var NINJA
Test: get_build_var ANDROID_GOALS
Test: get_build_var NINJA_GOALS
Test: get_build_var KATI_GOALS
Test: MAKECMDGOALS="droid sdk dumpvar-ANDROID_GOALS" get_build_var ANDROID_GOALS
Test: MAKECMDGOALS="droid sdk dumpvar-NINJA_GOALS" get_build_var NINJA_GOALS
Test: MAKECMDGOALS="droid sdk dumpvar-KATI_GOALS" get_build_var KATI_GOALS
Test: MAKECMDGOALS="out/build-a.ninja dumpvar-ANDROID_GOALS" get_build_var ANDROID_GOALS
Test: get_build_var SOONG_MAKEVARS_MK
Test: get_build_var SOONG_VARIABLES
Test: CALLED_FROM_SETUP=true BUILD_SYSTEM=build/core make -f build/core/config.mk out/soong/soong.variables showcommands
Test: Compare soong.variables from above, and before/after with `m`
Test: Compare out before/after with `m doesnotexist`
Test: `m dist doesnotexist`
Change-Id: I1bc291aa165297c930fe600067edad6ce4979210
diff --git a/core/ninja_config.mk b/core/ninja_config.mk
new file mode 100644
index 0000000..ab88515
--- /dev/null
+++ b/core/ninja_config.mk
@@ -0,0 +1,69 @@
+ifeq ($(filter address,$(SANITIZE_HOST)),)
+NINJA ?= prebuilts/build-tools/$(HOST_PREBUILT_TAG)/bin/ninja
+else
+NINJA ?= prebuilts/build-tools/$(HOST_PREBUILT_TAG)/asan/bin/ninja
+endif
+
+KATI_OUTPUT_PATTERNS := $(OUT_DIR)/build%.ninja $(OUT_DIR)/ninja%.sh
+
+# Modifier goals we don't need to pass to Ninja.
+NINJA_EXCLUDE_GOALS := showcommands all dist
+.PHONY : $(NINJA_EXCLUDE_GOALS)
+
+# A list of goals which affect parsing of makefiles and we need to pass to Kati.
+PARSE_TIME_MAKE_GOALS := \
+	$(PARSE_TIME_MAKE_GOALS) \
+	$(dont_bother_goals) \
+	all \
+	APP-% \
+	DUMP_% \
+	ECLIPSE-% \
+	PRODUCT-% \
+	AUX-% \
+	boottarball-nodeps \
+	brillo_tests \
+	btnod \
+	build-art% \
+	build_kernel-nodeps \
+	clean-oat% \
+	continuous_instrumentation_tests \
+	continuous_native_tests \
+	cts \
+	custom_images \
+	deps-license \
+	dicttool_aosp \
+	dist \
+	dump-products \
+	eng \
+	fusion \
+	oem_image \
+	online-system-api-sdk-docs \
+	pdk \
+	platform \
+	platform-java \
+	product-graph \
+	samplecode \
+	sdk \
+	sdk_addon \
+	sdk_repo \
+	snod \
+	stnod \
+	systemimage-nodeps \
+	systemtarball-nodeps \
+	target-files-package \
+	test-art% \
+	user \
+	userdataimage \
+	userdebug \
+	valgrind-test-art% \
+	vts \
+	win_sdk \
+	winsdk-tools
+
+# Any Android goals that need to be built.
+ANDROID_GOALS := $(filter-out $(KATI_OUTPUT_PATTERNS) $(CKATI) $(MAKEPARALLEL),\
+    $(sort $(ORIGINAL_MAKECMDGOALS) $(MAKECMDGOALS)))
+# Goals we need to pass to Ninja.
+NINJA_GOALS := $(filter-out $(NINJA_EXCLUDE_GOALS), $(ANDROID_GOALS))
+# Goals we need to pass to Kati.
+KATI_GOALS := $(filter $(PARSE_TIME_MAKE_GOALS),  $(ANDROID_GOALS))