test: Add initial support for catch2

This will be used by future test cases in place of googletest.

Change-Id: I41bf1d4f85ebffd1353e6d33a8eaee49803cb254
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/test/catch2_main.cpp b/test/catch2_main.cpp
new file mode 100644
index 0000000..4ed06df
--- /dev/null
+++ b/test/catch2_main.cpp
@@ -0,0 +1,2 @@
+#define CATCH_CONFIG_MAIN
+#include <catch2/catch.hpp>