crt: Fix some function symbols in msvcr90.def.in and msvcr100.def.in files

Following symbols represents functions. So remove DATA keyword from them.

__report_gsfailure
_byteswap_uint64
_byteswap_ulong
_byteswap_ushort
_get_errno
_rotl64
_rotr64
_set_errno
btowc
mbrlen
mbrtowc
mbsrtowcs
strnlen
wcrtomb
wcsnlen
wcsrtombs
wctob

Signed-off-by: Martin Storsjö <martin@martin.st>