Weaken more rust symbols

Makefile

@@ -52,7 +52,11 @@ WEAKEN_SYMBOLS=\
 	-W __muloti4 \
 	-W __udivti3 \
 	-W __umodti3 \
-	-W __rust_probestack
+	-W __rust_probestack \
+	-W __rust_alloc \
+	-W __rust_alloc_zeroed \
+	-W __rust_dealloc \
+	-W __rust_realloc
 
 .PHONY: all clean fmt install install-headers libs submodules test