arctwo, md4, md5, sha1, sha256, sha512: no 'static inline'

arctwo, md4, md5, sha1, sha256, sha512: no 'static inline'

* lib/arctwo.c (to_uchar):
* lib/md4.c (set_uint32):
* lib/md5.c (set_uint32):
* lib/sha1.c (set_uint32):
* lib/sha256.c (set_uint32):
* lib/sha512.c (set_uint64):
Now static, not static inline.  This is a bit simpler, and doesn't
affect performance with GCC and default optimization.
* m4/arctwo.m4 (gl_ARCTWO):
* m4/md4.m4 (gl_MD4):
* m4/md5.m4 (gl_MD5):
* m4/sha1.m4 (gl_SHA1):
* m4/sha256.m4 (gl_SHA256):
* m4/sha512.m4 (gl_SHA512):
Do not require AC_C_INLINE.