refactor: use rules_patchelf

Provides "real-world" usage of rules_patchelf.

• patchelf_unpack provides an option to filter-out files which wont be unpacked, using the filters attribute. Currently, not specifying any filters results in an error until rules_patchelf-!7 goes through. For now, we specify usr/share/doc/** for every patchelf_unpack target since we do not need the documentation.

Closes #36 (closed)