zig_binary|library|test should support a Zig binary with library dependencies (.a, .so)

[aherrmann]

Zig has two different ways to link against pre-built objects or libraries. Either, by passing the corresponding files on the command-line, in which case they are passed as file paths to the underlying linker, or by passing -l type flags, in which case they are looked up in the library search paths and either resolved to files or forwarded as -l type flags to the underlying linker.

• Link against static cc_library. #162
• Link against shared cc_library. #164
• Link against cc_shared_library. #178
• Link against framework cc_library. #179
• Link against objects cc_library. #180
• Support LTO with cc_library deps. #181
• Support alwayslink cc_library. #182

[iphydf]

I'm also looking to do what #146 wants. I want to link a cc_library to a zig_binary (or library or test). Also, ideally I would be able to include headers from those cdeps. I'm trying to make https://github.com/nodecum/c-toxcore-zig which depends on https://github.com/TokTok/c-toxcore work in bazel.

[aherrmann]

Linking against static libraries is now supported with #162. Shared library dependencies are a bit more complicated, see #165.