[RFC] Add matchaddpos()-related vim patches. [vim-patch: 7.4.330, 7.4.334, 7.4.343, 7.4.344, 7.4.362]

Adds patches 7.4.330, 334, 343, 344 and 362.
use portable format specifier:

    EMSGN("E798: ID is reserved for \"match\": %" PRId64, id);