Skip LeakSanitizer

It's broken, see rust-lang/rust#111073.

Author: Thomasdezeeuw

Makefile.include

@@ -26,7 +26,9 @@ test:
 
 test_sanitizers:
 	$(MAKE) test_sanitizer sanitizer=address
-	$(MAKE) test_sanitizer sanitizer=leak
+	# LeakSanitizer is broken, see
+	# <https://github.com/rust-lang/rust/issues/111073>.
+	#$(MAKE) test_sanitizer sanitizer=leak
 	$(MAKE) test_sanitizer sanitizer=memory
 	$(MAKE) test_sanitizer sanitizer=thread