Log Message:
devel/compiledb-go: import compiledb-go-1.3.0

Tool for generating Clang's JSON Compilation Database file for GNU
`make`-based build systems.

It's aimed mainly at non-cmake (cmake already generates compilation
database) large codebases. Inspired by projects like YCM-Generator
and Bear, but faster (mainly with large projects), since in most
cases it doesn't need a clean build (as the mentioned tools do) to
generate the compilation database file, to achieve this it uses
the make options such as -n/--dry-run and -k/--keep-going to extract
the compile commands. Also, it's more cross-compiling friendly than
YCM-generator's fake-toolchanin approach.