debug: Minor QOL improvements for osx
debug: Minor QOL improvements for osx

* Handle FileNotFound errors when searching for .o files
* Use the STAB symbol name when everything else fails

raulgrell/zig,raulgrell/zig,raulgrell/zig,raulgrell/zig,zig-lang/zig,raulgrell/zig,zig-lang/zig,zig-lang/zig,andrewrk/zig,andrewrk/zig