configure.ac: correct name of device-mapper-devel for RHEL v1.4.3
[petitboot] / m4 /
drwxr-xr-x   ..
-rw-r--r-- 25056 ax_with_curses.m4
-rw-r--r-- 9511 ax_with_curses_extra.m4
-rw-r--r-- 9400 gpgme.m4