gitignore: Change to support meson instead of autotools

Change-Id: Ie53d95648eebf53443a16290e80d125ccbc7d7dd
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/.gitignore b/.gitignore
index f6d0b51..7fdf4d4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,32 +1,2 @@
-.deps/
-Makefile
-Makefile.in
-aclocal.m4
-ar-lib
-autom4te.cache/
-compile
-config.guess
-config.h
-config.h.in
-config.h.in~
-config.log
-config.status
-config.sub
-configure
-depcomp
-install-sh
-ltmain.sh
-missing
-snoopd
-snooper
-snoopd-main.o
-snooper-example.o
-stamp-h1
-test-driver
-x86_64-openbmc-linux-libtool
-x86_64-libtool
-test/post_reporter_test
-test/post_reporter_test.log
-test/post_reporter_test.o
-test/post_reporter_test.trs
-test/test-suite.log
+/build*/
+/subprojects/*