Clean up the .gitignore file

Now that we're only building with meson, all the detritus should be
exclusively in the build directory, with the exception of the detritus
left by various editors (and ctags).

.gitignore

@@ -1,82 +1,4 @@
-#
-#		X.Org module default exclusion patterns
-#		The next section if for module specific patterns
-#
-#	Do not edit the following section
-# 	GNU Build System (Autotools)
-aclocal.m4
-autom4te.cache/
-autoscan.log
-ChangeLog
-compile
-config.guess
-config.h
-config.h.in
-config.log
-config-ml.in
-config.py
-config.status
-config.status.lineno
-config.sub
-configure
-configure.scan
-depcomp
-.deps/
-INSTALL
-install-sh
-.libs/
-libtool
-libtool.m4
-ltmain.sh
-lt~obsolete.m4
-ltoptions.m4
-ltsugar.m4
-ltversion.m4
-Makefile
-Makefile.in
-mdate-sh
-missing
-mkinstalldirs
-*.pc
-py-compile
-stamp-h?
-symlink-tree
-test-driver
-texinfo.tex
-ylwrap
-
-#	Do not edit the following section
-# 	Edit Compile Debug Document Distribute
 *~
-*.[0-9]
+*.swp
-*.[0-9]x
-*.bak
-*.bin
-core
-*.dll
-*.exe
-*-ISO*.bdf
-*-JIS*.bdf
-*-KOI8*.bdf
-*.kld
-*.ko
-*.ko.cmd
-*.lai
-*.l[oa]
-*.[oa]
-*.obj
 *.patch
-*.so
+tags
-*.pcf.gz
-*.pdb
-*.tar.bz2
-*.tar.gz
-#
-#		Add & Override patterns for xserver 
-#
-#		Edit the following section as needed
-# For example, !report.pc overrides *.pc. See 'man gitignore'
-# 
-doltcompile
-doltlibtool
-xserver.ent