Userspace: gitignore binaries

Author: https://github.com/sleepy-monax
Commit: https://github.com/SerenityOS/serenity/commit/37c27e2e39e
Pull-request: https://github.com/SerenityOS/serenity/pull/7

Userland/.gitignore

@@ -1,46 +1,8 @@
+# Ignore all files without extension
+*
+!*.*
+!*/
+!Makefile
+
 *.o
 *.d
-id
-sh
-ps
-ls
-pwd
-sleep
-date
-false
-true
-hostname
-cat
-uname
-clear
-tst
-mm
-kill
-tty
-fgrep
-mkdir
-touch
-sync
-more
-guitest2
-sysctl
-rm
-cp
-rmdir
-dmesg
-top
-chmod
-pape
-ln
-df
-su
-env
-chown
-stat
-ping
-uc
-tc
-host
-qs
-mv
-uptime