Remove unneeded entries from toplevel .gitignore

Left-overs as the file was copied from mesa. Sort the remainder while
we're here.

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>

.gitignore

@@ -1,50 +1,22 @@
-*.a
-*.dll
-*.exe
-*.ilk
 *.la
 *.lo
 *.log
 *.o
-*.obj
-*.os
 *.pc
-*.pdb
 *.pyc
-*.pyo
-*.so
-*.so.*
-*.sw[a-z]
-*.tar
-*.tar.bz2
 *.tar.gz
 *.trs
-*.zip
 *~
-depend
-depend.bak
-bin/ltmain.sh
-lib
-lib64
-configure
-configure.lineno
-autom4te.cache
-aclocal.m4
-config.log
-config.status
-config.h
-config.h.in
-cscope*
-.scon*
-config.py
-build
-libtool
-manifest.txt
-.dir-locals.el
 .deps/
-.dirstamp
 .libs/
 Makefile
 Makefile.in
-core
+aclocal.m4
+autom4te.cache
+config.h
+config.h.in
+config.log
+config.status
+configure
+libtool
 stamp-h1