Include nano in TWRP by default

Use 'TW_EXCLUDE_NANO := true' to exclude from build

Will be excluded by default if 'TW_OEM_BUILD := true' is set

Change-Id: I812399ef9f3f5d3c7d4baf981924d49255c16e5a
diff --git a/Android.mk b/Android.mk
index f5821cc..1cc73eb 100755
--- a/Android.mk
+++ b/Android.mk
@@ -177,6 +177,7 @@
     TW_USE_TOOLBOX := true
     TW_EXCLUDE_MTP := true
     TW_EXCLUDE_TZDATA := true
+    TW_EXCLUDE_NANO := true
 endif
 
 ifeq ($(TARGET_USERIMAGES_USE_EXT4), true)
@@ -529,6 +530,11 @@
 ifneq ($(TW_EXCLUDE_TZDATA), true)
     TWRP_REQUIRED_MODULES += tzdata_twrp
 endif
+ifneq ($(TW_EXCLUDE_NANO), true)
+    TWRP_REQUIRED_MODULES += \
+        nano_twrp \
+        init.recovery.nano.rc
+endif
 # Allow devices to specify device-specific recovery dependencies
 ifneq ($(TARGET_RECOVERY_DEVICE_MODULES),)
     TWRP_REQUIRED_MODULES += $(TARGET_RECOVERY_DEVICE_MODULES)