Added yacc to the bootstrap tools.  It is needed very early to build at least compile_et and lex, and although almost any version of yacc could work, the version in -stable doesn't actually work with -current makefiles because it doesn't support -o.
Added yacc to the bootstrap tools.  It is needed very early to
build at least compile_et and lex, and although almost any version
of yacc could work, the version in -stable doesn't actually work
with -current makefiles because it doesn't support -o.

Submitted by:	Ian Holland <ianh@tortuga.com.au>

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