Add comments for tilde building

build.bat

@@ -80,11 +80,14 @@ set libs= ^
 	Synchronization.lib ^
 	bin\llvm\windows\LLVM-C.lib
 
+rem DO NOT TOUCH!
+rem THIS TILDE STUFF IS FOR DEVELOPMENT ONLY!
 set tilde_backend=0
 if %tilde_backend% EQU 1 (
 	set libs=%libs% src\tilde\tb.lib
 	set compiler_defines=%compiler_defines% -DODIN_TILDE_BACKEND
 )
+rem DO NOT TOUCH!
 
 
 set linker_flags= -incremental:no -opt:ref -subsystem:console