build: Consolidate the crypto_utils presence tests

No point checking filesystem repeatedly/check may change in future

Change-Id: I0413b07b850f785eb5150c6ed18836cc56e94d6f
diff --git a/prebuilt/Android.mk b/prebuilt/Android.mk
index b5891ac..3206346 100644
--- a/prebuilt/Android.mk
+++ b/prebuilt/Android.mk
@@ -96,7 +96,9 @@
     RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libgccdemangle.so
 endif
 ifeq ($(shell test $(PLATFORM_SDK_VERSION) -gt 23; echo $$?),0)
-    RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libcrypto.so
+
+    RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libcrypto.so \
+    $(if $(WITH_CRYPTO_UTILS),$(TARGET_OUT_SHARED_LIBRARIES)/libcrypto_utils.so)
     RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libpackagelistparser.so
     RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/liblzma.so
 endif