Configurations/windows-makefile.tmpl: refine clean targets.
Configurations/windows-makefile.tmpl: refine clean targets.

'nmake clean' was leaving some artefacts behind.

Reviewed-by: Richard Levitte <5fb523282dd7956571c80524edc2dccfa0bd8234@openssl.org>

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl