tools.scaffold: support more types and maybe types.
Revert "alien.libraries.finder: using find-library for some often missing libs"

This reverts commit a6b3f50e2c7248fdbeb0f6b8ddb11a0faa872615.

Conflicts:
	basis/gtk/ffi/ffi.factor
magic.ffi: add platforms.txt.
system: separate version-info to two lines.
listener: print version-info in command-line.
basis/extra: switch to "vocab." os name>> append require.
readline-listener: print version-info.
basis/extra: cleanup uses of add-library.