Set config.lit_tools_dir, which is needed by lit.llvm.initialize.

llvm-svn: 346271
GitOrigin-RevId: c3ad28d5e81ae9be0bf18b5c31065777dc2af66f
diff --git a/lit.site.cfg.py.in b/lit.site.cfg.py.in
index 09ae4a1..70169dd 100644
--- a/lit.site.cfg.py.in
+++ b/lit.site.cfg.py.in
@@ -9,6 +9,7 @@
 config.llvm_tools_dir = "@LLVM_TOOLS_DIR@"
 config.llvm_libs_dir = "@LLVM_LIBS_DIR@"
 config.llvm_shlib_dir = "@SHLIBDIR@"
+config.lit_tools_dir = "@LLVM_LIT_TOOLS_DIR@"
 config.llvm_plugin_ext = "@LLVM_PLUGIN_EXT@"
 config.debuginfo_tests_obj_root = "@DEBUGINFO_TESTS_BINARY_DIR@"
 config.debuginfo_tests_src_root = "@DEBUGINFO_TESTS_SOURCE_DIR@"