Add .gitignore

Took a .gitignore from another repo and added a few repo
specific items.

Change-Id: I42e71250ec714181d09a4449695d2905ce456203
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..8102930
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,46 @@
+# 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
+/phosphor-ledcontroller