[experiment] add extra loop deletion pass to llvm

Author: the8472

.gitmodules

@@ -36,8 +36,8 @@
 	url = https://github.com/rust-lang/edition-guide.git
 [submodule "src/llvm-project"]
 	path = src/llvm-project
-	url = https://github.com/rust-lang/llvm-project.git
-	branch = rustc/11.0-2020-10-12
+	url = https://github.com/the8472/llvm-project.git
+	branch = loop-delete-pass
 [submodule "src/doc/embedded-book"]
 	path = src/doc/embedded-book
 	url = https://github.com/rust-embedded/book.git