build: Remove autotools support

Since we use meson everywhere now, Clean up the autotools support.

Signed-off-by: George Liu <liuxiwei@inspur.com>
Change-Id: I05af8e42abf37f5a82e1b9aa275c789e7d984cf7
diff --git a/.gitignore b/.gitignore
index 5594e05..6da54be 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,49 +1,3 @@
-# Template from:
-# https://github.com/github/gitignore/blob/master/Autotools.gitignore
-
-# http://www.gnu.org/software/automake
-
-Makefile.in
-/ar-lib
-/mdate-sh
-/py-compile
-/test-driver
-/ylwrap
-
-# http://www.gnu.org/software/autoconf
-
-/autom4te.cache
-/aclocal.m4
-/compile
-/config.guess
-/config.h.in
-/config.sub
-/configure
-/configure.scan
-/depcomp
-/install-sh
-/missing
-/stamp-h1
-
-# https://www.gnu.org/software/libtool/
-
-/ltmain.sh
-
-# http://www.gnu.org/software/texinfo
-
-/texinfo.tex
-
-# Repo Specific Items
-*.o
-*.trs
-/config.h
-/config.h.in~
-*.log
-/config.status
-Makefile
-.deps
-*-libtool
-/test/utest
-phosphor-ledmanager
-led-gen.hpp
-fault-monitor/phosphor-fru-fault-monitor
+build*/
+subprojects/*
+!subprojects/*.wrap