android: vulkan: add support for libmesa_vulkan_util

The following changes are implemented:

Add src/vulkan/Android.mk to build libmesa_vulkan_util
Android.mk: add src/vulkan to SUBDIR to build new module
intel/vulkan: fix libmesa_vulkan_util,vk_enum_to_str.h dependencies
Add -o OUTPUT_PATH option in src/vulkan/util/gen_enum_to_str.py script
Use -o OUTPUT_PATH option in automake generation rules for vk_enum_to_str.{c,h}

Fixes: e9dcb17 "vulkan/util: Add generator for enum_to_str functions"
Fixes: 8e03250 "vulkan: Combine wsi and util makefiles"
Reviewed-by: Dylan Baker <dylan@pnwbakers.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

[Emil Velikov]
 - Move parser within main()
 - Use --outdir instead of -o
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>

src/intel/vulkan/Android.mk

@@ -74,7 +74,8 @@ include $(BUILD_STATIC_LIBRARY)
 ANV_INCLUDES := \
 	$(VULKAN_COMMON_INCLUDES) \
 	$(call generated-sources-dir-for,STATIC_LIBRARIES,libmesa_anv_entrypoints,,) \
-	$(call generated-sources-dir-for,STATIC_LIBRARIES,libmesa_nir,,)/nir
+	$(call generated-sources-dir-for,STATIC_LIBRARIES,libmesa_nir,,)/nir \
+	$(call generated-sources-dir-for,STATIC_LIBRARIES,libmesa_vulkan_util,,)/util
 
 #
 # libanv for gen7
@@ -172,7 +173,10 @@ LOCAL_C_INCLUDES := \
 	$(ANV_INCLUDES) \
 	$(MESA_TOP)/src/compiler
 
-LOCAL_WHOLE_STATIC_LIBRARIES := libmesa_anv_entrypoints libmesa_genxml
+LOCAL_WHOLE_STATIC_LIBRARIES := \
+	libmesa_anv_entrypoints \
+	libmesa_genxml \
+	libmesa_vulkan_util
 
 LOCAL_GENERATED_SOURCES += $(intermediates)/anv_entrypoints.c