Use /twres instead of /res for theme resources

AOSP and other ROM trees now do a rm -rf of the res folder during
the ramdisk creation process that removes the TWRP resources.
Using /twres instead of /res works around this issue making TWRP
more compatible with AOSP and other build trees.

Change-Id: I0d4c7e06ca381ac5aa0069b6f2b8c47f7dec49e7

Android.mk

@@ -28,6 +28,9 @@ ifeq ($(PROJECT_PATH_AGREES),true)
 
 include $(CLEAR_VARS)
 
+TWRES_PATH := "/twres/"
+TWHTCD_PATH := $(TWRES_PATH)htcd/
+
 TARGET_RECOVERY_GUI := true
 
 LOCAL_SRC_FILES := \
@@ -364,6 +367,8 @@ endif
 ifneq ($(TARGET_RECOVERY_DEVICE_MODULES),)
     LOCAL_ADDITIONAL_DEPENDENCIES += $(TARGET_RECOVERY_DEVICE_MODULES)
 endif
+LOCAL_CFLAGS += -DTWRES=\"$(TWRES_PATH)\"
+LOCAL_CFLAGS += -DTWHTCD_PATH=\"$(TWHTCD_PATH)\"
 
 include $(BUILD_EXECUTABLE)