* sysdeps/sparc/Makefile [subdir=crypt] (crypt): Reset only if set
to original value of `crypt'.
* sysdeps/unix/sysv/sysv4/solaris2/sparc/Makefile [subdir=crypt]
(crypt): New variable, set to crypt.solar.
* sysdeps/sparc/mul.S: Renamed to `dotmul.S'.
* sysdeps/sparc/Makefile (routines): Reference `dotmul.S', not `mul.S',
to avoid a misreference that would override sysdeps/generic/mul.c.
* sysdeps/sparc/Dist: Likewise.