Enabled security checks for mingw and osx gitian builds

[navbuilder]

A new build of ca4124352d25654d84bb41c806487e877369b992 has completed succesfully! Binaries available at https://build.nav.community/binaries/mxaddict:enable-security-check-for-win-osx-builds

[mxaddict]

Closing in favor of new repo that will already have these features enabled