Touch the correct variables for the system; shlib_wrap.sh on Solaris

If there is cause to think LD_LIBRARY_PATH_32 and LD_PRELOAD_32 are
appropriate variables to touch, do so.  Otherwise, touch the usual
LD_LIBRARY_PATH and LD_PRELOAD.  This covers for older installations
that don't have a mix of 32-bit and 64-bit libs.

Reviewed-by: Andy Polyakov <appro@openssl.org>