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/flashutils/Android.mk b/flashutils/Android.mk
index 33f32d6..7ad313b 100644
--- a/flashutils/Android.mk
+++ b/flashutils/Android.mk
@@ -6,7 +6,7 @@
 LOCAL_SRC_FILES := flashutils.c
 LOCAL_MODULE := libflashutils
 LOCAL_MODULE_TAGS := optional
-LOCAL_C_INCLUDES += bootable/recovery
+LOCAL_C_INCLUDES += $(commands_recovery_local_path)
 LOCAL_STATIC_LIBRARIES := libmmcutils libmtdutils libbmlutils libcrecovery
 
 BOARD_RECOVERY_DEFINES := BOARD_BML_BOOT BOARD_BML_RECOVERY
@@ -108,7 +108,7 @@
 LOCAL_SRC_FILES := flashutils.c
 LOCAL_MODULE := libflashutils
 LOCAL_MODULE_TAGS := eng
-LOCAL_C_INCLUDES += bootable/recovery
+LOCAL_C_INCLUDES += $(commands_recovery_local_path)
 LOCAL_SHARED_LIBRARIES := libc libmmcutils libbmlutils
 LOCAL_STATIC_LIBRARIES := libmtdutils