remove geteltorito and mtools from lbmk

we needed these for extracting intel vga roms from
lenovoo updates, for t480, very briefly. about an hour
after i pushed that patch, mate kukri fixed libgfxinit
and then i removed the vgarom integration because it
wasn't needed anymore.

however, i forgot to remove geteltorito/mtools from
dependencies. some distros like fedora were problematic
about it.

the best thing about bugs is when you don't have to fix them.

Signed-off-by: Leah Rowe <leah@libreboot.org>

.gitignore

@@ -39,3 +39,5 @@
 *.tar.*
 /m
 /f
+/r
+/e