Fix how gssapi.h is rebuilt on Windows; accidentally omitted from
r24533.


https://github.com/krb5/krb5/commit/6aa200b82a8449ea147a0b7971ace6eb2af753ad
Commit By: ghudson
Revision: 24534
Changed Files:
U   trunk/src/lib/gssapi/generic/Makefile.in