[perl #121249] [BUG] Configure.pl not giving enough hints about what options to use when building with MoarVM as the backend

[Carl Mäsak via RT]

<dalek> nqp: 1658541 | jnthn++ | Configure.pl:
<dalek> nqp: Give a hint about --gen-moar when no moar is found
<dalek> nqp: review: https://github.com/perl6/nqp/commit/16585410c9
<jnthn> masak: Hopefully 1658541 helps a little
<masak> jnthn++
<masak> ok, resolving the rakudobug.