build: fetch Node.js sources from tar.gz archive instead of Git

[jesec]

Bug: #204, #212

For #212 use case, the user may place the source archive and its .sha256sum to $PKG_CACHE_PATH/node (by default, PKG_CACHE_PATH is ~/.pkg-cache), if the network connection is restricted.

[jesec]

cc: @blami

[robertsLando]

Just wondering if it could make sense to provide both ways instead of completely drop git?

[blami]

Thanks for heads up. I went with recommendation given in #212 and patch and pre-build my tarball outside pkg, then just provide binary in expected place so I technically don't need this nor other patch to make certain bits of Node.js shared with OS anymore. I will close my PR - forgot about it.

@robertsLando That is what my patch #212 does and @jesec didn't like it.

[robertsLando]

Ok I don't want to prevent this being merged. I trust @jesec in his choice

[jesec]

The real aim of the PR is to deal with #204. I think it is better to be less reliant on the unmanaged packages on the system (in that case, git). It just happens to deal with #212 as well, with zero additional complexity.