Add exclusion criteria for "Fix Recovery Bootloop"

Should only be included on devices that use initramfs,
i.e. legacy SAR, recovery-in-boot

Change-Id: I2408fcd993e1e381f49b3d5ae860694b2fade4d2

Android.mk

@@ -193,6 +193,12 @@ endif
 ifeq ($(TW_EXCLUDE_MTP),)
     LOCAL_SHARED_LIBRARIES += libtwrpmtp-ffs
 endif
+ifeq ($(BOARD_USES_RECOVERY_AS_BOOT), true)
+    LOCAL_CFLAGS += -DBOARD_USES_RECOVERY_AS_BOOT
+endif
+ifeq ($(BOARD_BUILD_SYSTEM_ROOT_IMAGE), true)
+    LOCAL_CFLAGS += -DBOARD_BUILD_SYSTEM_ROOT_IMAGE
+endif
 
 #TWRP Build Flags
 ifeq ($(TW_EXCLUDE_MTP),)