Added weapons fallback data for the laser guided rockets, AIM-54's,
AGM-65 E/F, 4X Hellfire and TOW carried by US helis, rockets for them
to fall back to, all of the USSR IR missiles, R-3R, Mk-83 & Mk-84 and
adjusted the dates for the R-27ER &ET to 1990.
This only takes effect for default loadouts. Custom loadouts set from
the UI will allow LGBs. In the default case there will not be buddy-lase
coordination so we should take iron bombs instead.
Also adds single/double Mk 83 and Mk 82 weapon data to accomodate this.
Hornet should be compatible with 1990 campaigns now. Air-to-ground
weapon restrictions are less interesting for AI aircraft so I haven't
covered *all* the variants here (the >2 variants of each carried by the
B1 and such).
Both types use JSOW -> Walleye -> Mk 84. The JSOW A should maybe fall
back to some CBU instead, but I think the standoff capability is more
important to preserve than the warhead type.
