Avoid ambiguous overload when doing operations on a Match (#2040)
Avoid ambiguous overload when doing operations on a Match (#2040)

- because of the operator T * converter operations between a Match and
  an int that could be pointer arithmetic or comparisons generate an
  ambiguous overload message.  Avoid that by explicitly supplying these
  operator overloads that avoid user-defined conversions.
hanw/p4c,p4lang/p4c,hanw/p4c,hanw/p4c,p4lang/p4c,p4lang/p4c,p4lang/p4c,p4lang/p4c,mbudiu-vmw/p4c-clone,hanw/p4c,mbudiu-vmw/p4c-clone,mbudiu-vmw/p4c-clone,mbudiu-vmw/p4c-clone