[Build system] should abort on updating nonexistent target
|Reported by:||diver||Owned by:||bonefish|
This is hrev44133, gcc2hybrid.
I was trying to update something and accidentally misspelled target name. I couldn't figure out why the binary doesn't change. Later I noticed that update feature doesn't show any errors if you try to update something which doesn't even exist.
jam -j2 @disk update 123