curl.sh: select schannel when calling curl.exe --version [ci skip]
curl.sh: select schannel when calling curl.exe --version [ci skip]

- this prevents any OpenSSL (or other future non-native SSL-backend)
  code to on the build machine.
- also drop 'curl.exe --dump-module-paths'. It's useful only for
  rare runtime edge cases and for the more part covered by objdump.

vszakats/harbour-deps,vszakats/harbour-deps