md4/md5: disable optimization causing unaligned access

md4/md5: disable optimization causing unaligned access

This restores unit tests with GCC 11 and LTO.

    md5.c:92:23: warning: cast from 'const unsigned char *' to 'const uint32_t *' (aka 'const unsigned int *') increases required alignment from 1 to 4 [-Wcast-align]
                    STEP(F, a, b, c, d, SET(0), 0xd76aa478, 7)
                    ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
    md5.c:51:4: note: expanded from macro 'SET'
            (*(const uint32_t *)&ptr[(n) * 4])
              ^
    md5.c:37:29: note: expanded from macro 'STEP'
            (a) += f((b), (c), (d)) + (x) + (t); \
                                       ^

    md5.c:92:3: runtime error: load of misaligned address 0x61900000008b for type 'const uint32_t' (aka 'const unsigned int'), which requires 4 byte alignment
    0x61900000008b: note: pointer points here
     41  41 41 41 41 41 41 41 41  41 41 41 41 41 41 41 41  41 41 41 41 41 41 41 41  41 41 41 41 41 41 41
                  ^

Gbp-Pq: Name md4-md5-disable-optimization-causing-unaligned-access.patch