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.
