--enable-static produces thin archives on Linux

[branchseer]

This makes it inconvenient to distribute Node.js as a prebuilt static library for embedders.

Based on what I learned from #7957 (comment), thin archives save space and compilation time, and they are turned off if the build target is a static library and the OS is solaris.

Shouldn't the operator be or instead of and? From what I understand SmartOS can't handle thin archives so they should be disabled whatever the build target is.

[branchseer]

cc: @bnoordhuis

[bnoordhuis]

standalone_static_library is only relevant when building a static archive. gyp raises an error when you try to enable it for a non-static library build, hence the and.

[bnoordhuis]

I'm closing this as answered, cheers.