Handle sdk version 22 as lollipop

Change-Id: I87c17715d7acdf6ae15f8a39e3e316715bade6f3
diff --git a/prebuilt/Android.mk b/prebuilt/Android.mk
index 00c5248..9ff304c 100644
--- a/prebuilt/Android.mk
+++ b/prebuilt/Android.mk
@@ -69,7 +69,7 @@
 RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libflashutils.so
 RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libstlport.so
 RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libfusesideload.so
-ifeq ($(PLATFORM_SDK_VERSION), 21)
+ifneq (,$(filter $(PLATFORM_SDK_VERSION), 21 22))
     # libraries from lollipop
     RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libbacktrace.so
     RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libunwind.so
@@ -138,7 +138,7 @@
     RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libopenaes.so
 endif
 ifeq ($(TARGET_USERIMAGES_USE_F2FS), true)
-    ifeq ($(PLATFORM_SDK_VERSION), 21)
+    ifneq (,$(filter $(PLATFORM_SDK_VERSION), 21 22))
         RELINK_SOURCE_FILES += $(TARGET_ROOT_OUT_SBIN)/mkfs.f2fs
     else
         RELINK_SOURCE_FILES += $(TARGET_OUT_EXECUTABLES)/mkfs.f2fs