build: fix openssl link error on windows

This commit attempts to fix an issue when building on windows using the
following command line options:
.\vcbuild.bat dll debug x64 vc2015

This will result in the following options passed to configure:
configure --debug --shared --dest-cpu=x64 --tag=

This commit excludes the dependency to openssl if node is configured
with --shared.

Also, FP_API to the categories to export in mkssldef when generating
the module definition (openssl.def) allowing the build to compile and
link successfully.

Fixes: https://github.com/nodejs/node/issues/12952
PR-URL: https://github.com/nodejs/node/pull/13078


Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Refael Ackermann <refack@gmail.com>