[Build system] should abort on updating nonexistent target

[diver]

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

[bonefish]

That may be fixed by inserting

Depends $(buildTarget) : $(HAIKU_BUILD_PROFILE_PARAMETERS) ;

in ​the "update" case block in DefineBuildProfile in build/jam/MiscRules. I don't have the time to test this ATM. Not sure when/how the missing target is reported with this solution. It may be nicer to explicitly check whether all update targets have been found after having processed the complete jamfile tree.