[lit] Add a test for internal shell execution behaviors.

llvm-svn: 174102
diff --git a/llvm/utils/lit/tests/Inputs/shtest-shell/lit.cfg b/llvm/utils/lit/tests/Inputs/shtest-shell/lit.cfg
new file mode 100644
index 0000000..4878b65
--- /dev/null
+++ b/llvm/utils/lit/tests/Inputs/shtest-shell/lit.cfg
@@ -0,0 +1,5 @@
+config.name = 'shtest-shell'
+config.suffixes = ['.txt']
+config.test_format = lit.formats.ShTest()
+config.test_source_root = None
+config.test_exec_root = None