Add myself as a maintainer.

Change-Id: Ie1b0cb082a384144eef327e9294949e9bacc4415
Fix build error in sol-thread.c:info_cb

gdb/ChangeLog:

        * sol-thread.c (info_cb) [ti.ti_startfunc != 0]: Change type
        of local variable msym to const struct bound_minimal_symbol.
        Adjust use accordingly.
        [ti.ti_state == TD_THR_SLEEP]: Likewise.
Fix -Wpointer-sign warning in sol-thread.c

This fixes a couple of compiler warnings in rw_common when calling
target_read_memory/target_write_memory due to the type of parameter
"buf" (char *) not matching what these function expect (gdb_byte *).

gdb/ChangeLog:

        * sol-thread.c (rw_common): Change type of parameter "buf"
        to "gdb_byte *".
        (ps_pdwrite, ps_ptwrite): Cast parameter "buf" in call to
        rw_common to "gdb_byte *" instead of "char *".
Fix date in some of my recent ChangeLog entries...