Manual Makefile tweaks:
- remove html output folder on "make clean"
- fix "make manual" that was broken for some targets (e.g. h100) when configured for normal / sim build
- add manual-txt target to generate a plain text version. Requires links.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11319 a1c6a512-1295-4272-9138-f99709370657
3 files changed