create fallback gtest subproject dependency

Allows project to be built and tested locally.

Signed-off-by: Zane Shelley <zshelle@us.ibm.com>
Change-Id: I0965581e5b2bc006a0edfcd05a6fea996f3f6ec2
diff --git a/subprojects/googletest.wrap b/subprojects/googletest.wrap
new file mode 100644
index 0000000..56da9ef
--- /dev/null
+++ b/subprojects/googletest.wrap
@@ -0,0 +1,3 @@
+[wrap-git]
+url = https://github.com/google/googletest
+revision = HEAD