.gitignore: simplify due to meson

There is a lot of cruft left in the .gitignore from when this
repository was built using autotools and when it included libpldm,
so simplify it.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ice4f5fea1d0e19bea71643a56df06df547763642
diff --git a/.gitignore b/.gitignore
index 516b46f..fd9ea53 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,95 +1,5 @@
+build*/
 subprojects/*
-!subprojects/libpldm*
 !subprojects/*.wrap
 
-# 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
-/autoscan.log
-/autoscan-*.log
-/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
-*.a
-*.o
-*.lo
-*.la
-*.pc
-*.so*
-/config.h
-/config.h.in~
-/config.log
-/config.status
-Makefile
-.deps
-.dirstamp
-.libs/
-/libtool
-/*-libtool
-.project
-/aminclude_static.am
-/m4
-/tool/pldmtool
-
-# Code Coverage
-*.gcda
-*.gcno
-*.trs
-*-coverage*
-
-# test related
-/test/*.log
-/test/*.trs
-/test-suite.log
-/test/*.gcda
-/test/*.gcno
-/test/vgcore.*
-/libpldm/tests/vgcore.*
-/test/libpldm_base_test
-/test/libpldmresponder_base_test
-/test/libpldm_bios_test
-/test/libpldmresponder_bios_formatTime_test
-/test/libpldm_platform_test
-/test/libpldmoem_fileio_test
-/test/libpldmoemresponder_fileio_test
-/test/libpldmresponder_bios_test
-/test/libpldmresponder_file_io_test
-/test/libpldmresponder_pdr_state_effecter_test
-/test/libpldmresponder_bios_table_test
-
-# meson
-/build
-/builddir
-
-# vscode
 .vscode