fix sys-ssl librtmp build bug.

@@ -70,6 +70,9 @@ endif
 ifeq ($(HANDSHAKE), SSL)
     SRS_LIBSSL_L = $(SRS_OBJS)/openssl/lib/libssl.a $(SRS_OBJS)/openssl/lib/libcrypto.a
 endif
+ifneq ($(shell test -f $(SRS_OBJS)/openssl/lib/libssl.a && echo yes), yes)
+    SRS_LIBSSL_L = -lssl -lcrypt
+endif
 
 ssl:
 	@mkdir -p objs