Enabled -fPIC option for all toolchains
Enabled -fPIC option for all toolchains

Confirmed that turning -fPIC on when building on Windows works fine.

Spotme/couchbase-lite-java-core,gotmyjobs/couchbase-lite-java-core,couchbase/couchbase-lite-java-core,4u7/couchbase-lite-java-core