Fixes this build error:
dynamic_fmt.o: In function `DynamicFunc__crypt_md5_to_input_raw_Overwrite_NoLen':
.../john-1.8.0-jumbo-1/src/dynamic_fmt.c:4989: undefined reference to `MD5_body_for_thread'
Upstream issue:
https://github.com/magnumripper/JohnTheRipper/issues/1093