Split Debug and Install Sources. Default to Off

[Spacefreak18]

I default both options to off. Which is a little confusing because for example if you want to keep debug symbols in your binaries you'd have to say NO_STRIP=Yes. And if you want to separate your debug symbols you now would have to say NO_STRIP=No and NO_SPLIT=No.

INSTALL_SOURCES=Yes will install the source code to /usr/src. NO_SPLIT=No ( which requires NO_STRIP=No ) will split the debug symbol into /usr/debug.

It's still early development since I've still yet to upgrade a port since I've started using Venom Linux as my daily OS, so I still haven't had a need to handle that yet.