Moved all backend *.h files into the SOURCES primary as Automake
documentation states all source file types should be listed. This
causes Automake to include *.h files in rebuild rules for the targets.
Removed the '-DIN_HAMLIB' assignment from the CFLAGS primary in each
backend and assigned it to AM_CPPFLAGS in configure.ac. The effect is
the same and it simplifies the backend Makefile.am files.
Removed all commented lines.
Android makefile fragments are distributed as extra distribution files
by the GNU build system but are otherwise ignored. The Android build
support is independent and does not rely on the GNU build system.
See android/README.android for more info.
Signed-off-by: Nate Bargmann <n0nb@n0nb.us>
