md5 passwords: reduce static usage
md5 passwords: reduce static usage

    text           data     bss     dec     hex filename
-   1875              0     120    1995     7cb libcrypt/md5.o
+   1855              0      35    1890     762 libcrypt/md5.o

Signed-off-by: Denys Vlasenko <42afb3a19136e88700e8b77002ea6a5a94c16782@googlemail.com>

joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc,joel-porquet/tsar-uclibc