build: Add a test directory

Add a test directory to host future unit tests.

Change-Id: I5072cb3055386f7b1718edc45241c723d9e63a54
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/src/test/.gitignore b/src/test/.gitignore
new file mode 100644
index 0000000..7e563b8
--- /dev/null
+++ b/src/test/.gitignore
@@ -0,0 +1,2 @@
+*.log
+*.trs