Added DOTCALL instruction.


git-svn-id: https://svn.r-project.org/R/trunk@66616 00db46b3-68df-0310-9c12-caf00c1e9a41
Added COLON, SEQALONG, and SEQLEN instructions.


git-svn-id: https://svn.r-project.org/R/trunk@66617 00db46b3-68df-0310-9c12-caf00c1e9a41