world: Mark all build-tools.

nvi: Convert catalog creation to use hostprog.

nvi dump utility is not part of btools, so just split vidump as hostprog.
There were few issues:
* build races like dump and say spanish get created t

nvi: Convert catalog creation to use hostprog.

nvi dump utility is not part of btools, so just split vidump as hostprog.
There were few issues:
* build races like dump and say spanish get created twice (and raced)
* buildworld failures, from time to time i hit ./dump linking race (rare)
* ./dump being used as target program (problems on crosscompilations)
* missing env LANG=C for sort, minor issues in awk script and SHAREDIR.

Now even "cd usr.bin/vi && make -j9 depend all" should be race free.

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