Adds the ability to run pure Go unit tests in the Mojo test suite.

mojo/tools/data/gotests

Index: mojo/tools/data/gotests
diff --git a/mojo/tools/data/gotests b/mojo/tools/data/gotests
new file mode 100644
index 0000000000000000000000000000000000000000..ed60ff05c4b5bf5905fdaf3627c786d8cb377f02
--- /dev/null
+++ b/mojo/tools/data/gotests
@@ -0,0 +1,11 @@
+# This file contains a list of Go tests that should be run by the script
+# mojo/tools/run_pure_go_tests.py.
+#
+# The contents should be valid Python defining a global variable named
+# "test_dirs" defined as a list of lists. Each sublist contains the
+# components of a path, relative to the Mojo source root, of a directory
+# containing a Go package.
+test_dirs = [
+   # TODO(rudominer) Add some Go source directories here.
+   # ['mojom', 'mojom_parser', 'lexer']
+]