Build block TWRP with RECOVERY_VARIANT

Enable TWRP to reside alongside other recoveries with the naming
convention: bootable/recovery(-flag). If TWRP resides at
bootable/recovery and a device does not specify RECOVERY_VARIANT, then
it will build like normal. If TWRP resides at bootable/recovery-twrp,
then its makefiles will only be parsed if a device specifies
'RECOVERY_VARIANT := twrp'. This prevents TWRP specific makefile
warnings/errors (notably, missing DEVICE_RESOLUTION) when another
recovery is being built.

Change-Id: I8f02fffcd79c309c7123b9428eedc69af02e126e
diff --git a/mtdutils/Android.mk b/mtdutils/Android.mk
index 6843fa9..cdde25f 100644
--- a/mtdutils/Android.mk
+++ b/mtdutils/Android.mk
@@ -37,7 +37,7 @@
 ifeq ($(BOARD_USES_BML_OVER_MTD),true)
 include $(CLEAR_VARS)
 LOCAL_SRC_FILES := bml_over_mtd.c
-LOCAL_C_INCLUDES += bootable/recovery/mtdutils
+LOCAL_C_INCLUDES += $(commands_recovery_local_path)/mtdutils
 LOCAL_MODULE := libbml_over_mtd
 LOCAL_MODULE_TAGS := eng
 LOCAL_CFLAGS += -Dmain=bml_over_mtd_main
@@ -51,7 +51,7 @@
 LOCAL_MODULE_PATH := $(PRODUCT_OUT)/utilities
 LOCAL_UNSTRIPPED_PATH := $(PRODUCT_OUT)/symbols/utilities
 LOCAL_MODULE_STEM := bml_over_mtd
-LOCAL_C_INCLUDES += bootable/recovery/mtdutils
+LOCAL_C_INCLUDES += $(commands_recovery_local_path)/mtdutils
 LOCAL_STATIC_LIBRARIES := libmtdutils
 LOCAL_SHARED_LIBRARIES := libcutils liblog libc
 include $(BUILD_EXECUTABLE)