I would argue /etc/oclint is not necessary in these cases unless the binary is installed to /bin. We'd better have only one global config.

Or, another idea on top of the relative path, we could introduce a new custom variable in oclint-driver's CMakeLists.txt that takes user's input in compilation time that overrides the default relative path `../etc/oclint` for global conf file. For example, when oclint-driver is compiled, build machine could do something like

```
cmake -D FOO=BAR -D SYS_CONF_DIR=/etc ...
```

to use another folder instead. If we could do this, then package management systems like homebrew, apt-get can change it to a folder that is more familiar to users, `/usr/local/etc` and `/etc` respectively.

How about that?