lit: Fix infinite recursion when an out-of-tree test root is located inside the source test root.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179402 91177308-0d34-0410-b5e6-96231b3b80d8

utils/lit/tests/Inputs/exec-discovery-in-tree/lit.cfg

@@ -0,0 +1,7 @@
+# Verify that the site configuration was loaded.
+if config.test_source_root is None or config.test_exec_root is None:
+    lit.fatal("No site specific configuration")
+
+config.name = 'exec-discovery-in-tree-suite'
+config.suffixes = ['.txt']
+config.test_format = lit.formats.ShTest()

utils/lit/tests/Inputs/exec-discovery-in-tree/obj/lit.site.cfg

@@ -0,0 +1,4 @@
+import os
+config.test_exec_root = os.path.dirname(__file__)
+config.test_source_root = os.path.dirname(config.test_exec_root)
+lit.load_config(config, os.path.join(config.test_source_root, "lit.cfg"))

utils/lit/tests/Inputs/exec-discovery-in-tree/test-one.txt

@@ -0,0 +1 @@
+# RUN: true