Redo build stuff in response to Andy Chu's suggestions.

Toybox single binaries are now made directly with the new name instead of
stomping toybox and getting renamed.

Unstripped files now live in generated/unstripped.

Target to run all tests is now "make tests" to avoid conflict with "make test".

.singleconfig now has .PHONY: entries for all test_$NAME targets.

Default install location changed to /usr/toybox, code.html now says how
to change it (set $PREFIX).

scripts/ --uninstall works now. (And you get to keep the pieces!)
6 files changed