gitignore: add coverage and test generated files

Add coverage and test generated files to gitignore file.

Change-Id: I72d56567ea3bcadae6731070c7c1265b92d05a9b
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/.gitignore b/.gitignore
index c368285..5d249f7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -51,9 +51,6 @@
 .project
 /softoff/phosphor-softpoweroff
 /softoff/xyz/
-/test/sample_unittest
-/test/*.log
-/test/*.trs
 /fru-read-gen.cpp
 /ipmiwhitelist.cpp
 /sensor-gen.cpp
@@ -62,6 +59,16 @@
 /app/*.lo
 /channel-gen.cpp
 
+# test related
+/test/sample_unittest
+/test/*.log
+/test/*.trs
+/test-suite.log
+*-1.0-coverage*
+test/*.gcda
+test/*.gcno
+softoff/test
+
 # ignore vim swap files
 .*.sw*
 # failures from patch