[git commit master] make it possible to have include/applets.h-esque entries in .c files

[Denys Vlasenko]

commit: http://git.busybox.net/busybox/commit/?id=6c5bf0d347faded028e15d523c26a0d64c6d3920
branch: http://git.busybox.net/busybox/commit/?id=refs/heads/master

As an example, bunzip2 and bzcat is changed to use it.

Signed-off-by: Denys Vlasenko <vda.linux at googlemail.com>

Patch is too large, so refusing to show it