kleaf: Move lto docs to its own file.

Test: none
Change-Id: Ifb499573ce416a7cc0bc9686c4dc49fe2f2dbf92
diff --git a/kleaf/README.md b/kleaf/README.md
index fd3b0a9..e60972a 100644
--- a/kleaf/README.md
+++ b/kleaf/README.md
@@ -31,3 +31,5 @@
 `--config=local`: [Sandboxing](docs/sandbox.md)
 
 `--config=stamp`: [Handling SCM version](docs/scmversion.md)
+
+`--lto`: [Disable LTO during development](docs/lto.md)