Add description for WITH_GOOGLETEST

This is the logical negation of WITHOUT_GOOGLETEST, and helpful to have as
we now have different per-arch defaults for this option.

diff --git a/tools/build/options/WITH_GOOGLETEST b/tools/build/options/WITH_GOOGLETEST
new file mode 100644 (file)
index 0000000..8ed29dd
--- /dev/null
+++ b/tools/build/options/WITH_GOOGLETEST
@@ -0,0 +1,5 @@
+.\" $FreeBSD$
+Set to build and install
+.Lb libgmock ,
+.Lb libgtest ,
+and dependent tests.