gitignore: Add build artefacts

`git status` is pretty badly cluttered after running `make check`.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Change-Id: If7609527a20261658bbe2d4e2c71df0180175ca8
diff --git a/.gitignore b/.gitignore
index 635c79e..d2779ed 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,11 +17,17 @@
 *.gcno
 *.in
 install-sh
+*.la
 libtool
+*.lo
+*.log
 ltmain.sh
 m4
 Makefile
 missing
+*.o
 stamp-h1
 *.swp
 test-driver
+*.trs
+.libs