Fix pre-gyp for darwin targets if build on Linux or in Docker

[IKukhta]

Same issue as #3049 but for 'darwin' target.

node-libcurl fails to download precompiled binaries for darwin target:

2020-08-01 05:53:38 | node-pre-gyp verb cli [
2020-08-01 05:53:38 | node-pre-gyp verb cli '/usr/local/bin/node',
2020-08-01 05:53:38 | node-pre-gyp verb cli '/project/node_modules/node-libcurl/node_modules/.bin/node-pre-gyp',
2020-08-01 05:53:38 | node-pre-gyp verb cli 'install',
2020-08-01 05:53:38 | node-pre-gyp verb cli '--fallback-to-build'
2020-08-01 05:53:38 | node-pre-gyp verb cli ]
2020-08-01 05:53:38 | node-pre-gyp info using [email protected]
2020-08-01 05:53:38 | node-pre-gyp info using [email protected] | linux | x64
2020-08-01 05:53:38 | node-pre-gyp verb command install []
2020-08-01 05:53:38 | node-pre-gyp WARN Using request for node-pre-gyp https download
2020-08-01 05:53:38 | node-pre-gyp http GET https://github.com/JCMais/node-libcurl/releases/download/v2.2.0/node_libcurl-v2.2.0-electron-v8.1-darwin-x64-glibc.tar.gz
2020-08-01 05:53:38 | node-pre-gyp http 404 https://github.com/JCMais/node-libcurl/releases/download/v2.2.0/node_libcurl-v2.2.0-electron-v8.1-darwin-x64-glibc.tar.gz
2020-08-01 05:53:38 | node-pre-gyp WARN Tried to download(404): https://github.com/JCMais/node-libcurl/releases/download/v2.2.0/node_libcurl-v2.2.0-electron-v8.1-darwin-x64-glibc.tar.gz
2020-08-01 05:53:38 | node-pre-gyp WARN Pre-built binaries not found for [email protected] and [email protected] (electron-v8.1 ABI, glibc) (falling back to source compile with node-gyp)
2020-08-01 05:53:38 | node-pre-gyp http 404 status code downloading tarball https://github.com/JCMais/node-libcurl/releases/download/v2.2.0/node_libcurl-v2.2.0-electron-v8.1-darwin-x64-glibc.tar.gz

For windows it is ok:

2020-08-01 05:51:26 | node-pre-gyp info it worked if it ends with ok
2020-08-01 05:51:26 | node-pre-gyp verb cli [
2020-08-01 05:51:26 | node-pre-gyp verb cli '/usr/local/bin/node',
2020-08-01 05:51:26 | node-pre-gyp verb cli '/project/node_modules/node-libcurl/node_modules/.bin/node-pre-gyp',
2020-08-01 05:51:26 | node-pre-gyp verb cli 'install',
2020-08-01 05:51:26 | node-pre-gyp verb cli '--fallback-to-build'
2020-08-01 05:51:26 | node-pre-gyp verb cli ]
2020-08-01 05:51:26 | node-pre-gyp info using [email protected]
2020-08-01 05:51:26 | node-pre-gyp info using [email protected] | linux | x64
2020-08-01 05:51:26 | node-pre-gyp verb command install []
2020-08-01 05:51:26 | node-pre-gyp WARN Using request for node-pre-gyp https download
2020-08-01 05:51:26 | node-pre-gyp http GET https://github.com/JCMais/node-libcurl/releases/download/v2.2.0/node_libcurl-v2.2.0-electron-v8.1-win32-x64-unknown.tar.gz
2020-08-01 05:51:26 | node-pre-gyp http 200 https://github.com/JCMais/node-libcurl/releases/download/v2.2.0/node_libcurl-v2.2.0-electron-v8.1-win32-x64-unknown.tar.gz