gitignore: add test and coverage artifacts

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: If630a4c2411a66b4995f6807e185bd5cd36d165e
diff --git a/.gitignore b/.gitignore
index 288aef3..bc496d1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -66,14 +66,14 @@
 /entity-gen.cpp
 
 # test related
-/test/sample_unittest
 /test/*.log
 /test/*.trs
 /test-suite.log
 *-1.0-coverage*
-test/*.gcda
-test/*.gcno
+*.gcda
+*.gcno
 softoff/test
+test/*_unittest
 
 # ignore vim swap files
 .*.sw*