Use InstructionSet::CALL_FLAG_CONCAT
Use InstructionSet::CALL_FLAG_CONCAT

CALL_FLAG_CONCAT's definition is duplicated under both Generator and
InstructionSet. Generator's one is hard-coded, InstructionSet's one is auto-
generated.

Use InstructionSet::CALL_FLAG_CONCAT and remove Generator::CALL_FLAG_CONCAT.

The commit (1) introduced InstructionSet::CALL_FLAG_CONCAT and replaced
Generator::CALL_FLAG_CONCAT with it. But the commit (2) removed the use of
InstructionSet::CALL_FLAG_CONCAT and the commit (3) incorrectly used
Generator::CALL_FLAG_CONCAT.

  (1) 9b60cfd Rework VM instruction parsing and generation.
  (2) 55175ce Requiem for an era: o/~ oh compiler, your sexp expressions... o/~
  (3) 911f390 Moved lib/compiler-ng to lib/compiler.

Easily confirmed by following commands:
  $ git log -S::CALL_FLAG_CONCAT --stat
  $ git log -SCALL_FLAG_CONCAT --stat -p ./lib/ ./kernel

Well, this is the power of git. :p

benlovell/rubinius,benlovell/rubinius,lgierth/rubinius,digitalextremist/rubinius,sferik/rubinius,ruipserra/rubinius,jemc/rubinius,jemc/rubinius,Azizou/rubinius,dblock/rubinius,benlovell/rubinius,ngpestelos/rubinius,dblock/rubinius,Wirachmat/rubinius,digitalextremist/rubinius,mlarraz/rubinius,pH14/rubinius,kachick/rubinius,jemc/rubinius,Azizou/rubinius,jsyeo/rubinius,jemc/rubinius,jemc/rubinius,pH14/rubinius,kachick/rubinius,ruipserra/rubinius,lgierth/rubinius,ruipserra/rubinius,mlarraz/rubinius,ruipserra/rubinius,lgierth/rubinius,ruipserra/rubinius,Wirachmat/rubinius,Wirachmat/rubinius,benlovell/rubinius,ruipserra/rubinius,digitalextremist/rubinius,sferik/rubinius,jsyeo/rubinius,jsyeo/rubinius,sferik/rubinius,kachick/rubinius,benlovell/rubinius,lgierth/rubinius,sferik/rubinius,Wirachmat/rubinius,heftig/rubinius,heftig/rubinius,heftig/rubinius,ruipserra/rubinius,digitalextremist/rubinius,Azizou/rubinius,mlarraz/rubinius,jemc/rubinius,lgierth/rubinius,sferik/rubinius,kachick/rubinius,Wirachmat/rubinius,dblock/rubinius,pH14/rubinius,dblock/rubinius,heftig/rubinius,dblock/rubinius,pH14/rubinius,sferik/rubinius,lgierth/rubinius,digitalextremist/rubinius,jemc/rubinius,Azizou/rubinius,ngpestelos/rubinius,heftig/rubinius,ngpestelos/rubinius,benlovell/rubinius,sferik/rubinius,ngpestelos/rubinius,ngpestelos/rubinius,dblock/rubinius,ngpestelos/rubinius,heftig/rubinius,kachick/rubinius,jsyeo/rubinius,mlarraz/rubinius,kachick/rubinius,digitalextremist/rubinius,pH14/rubinius,dblock/rubinius,Wirachmat/rubinius,kachick/rubinius,kachick/rubinius,mlarraz/rubinius,benlovell/rubinius,ngpestelos/rubinius,Azizou/rubinius,Azizou/rubinius,heftig/rubinius,Azizou/rubinius,pH14/rubinius,Wirachmat/rubinius,pH14/rubinius,digitalextremist/rubinius,mlarraz/rubinius,jsyeo/rubinius,jsyeo/rubinius,mlarraz/rubinius,jsyeo/rubinius,lgierth/rubinius