update TRACKING file

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
install readtags command in install-bin make target

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
uninstall installed readtags command

uninstall-cmd removed readtags command in build directory.  This
should remove that in system (or somewhere it is installed) directory.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
prepare DESTDIR variable to switch the instillation directory

This patch is taken from ctags package of Fedora.

With this patch you can switch the top directory where ctags and
related files are installed. This is helpful to make a package like
rpm in Fedora. You can use the variable with following command line:

	$ make DESTDIR=$buildroot install

NOTE: DESTDIR is independent from --prefix= of configure script.

The concept of DESTDIR is also used in automake. See info of
automake for more details.
update TRACKING file

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
use DESTDIR when installing readctags.o readctags.h and readctags command

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
consider DESTDIR when making symblic links in install make target

Signed-off-by: Masatake YAMATO <yamato@redhat.com>