On MIPS R6 we have BC instruction that has 26bit offset. We exploit this
in order to generate deoptimizer table with two instructions per entry
instead of earlier three instructions per entry.

Bug: 
Change-Id: If6638a9d4aa1515bfaa61530767d26ce5a78b0b0
Reviewed-on: https://chromium-review.googlesource.com/536972Reviewed-by: Miran Karić <Miran.Karic@imgtec.com>
Reviewed-by: Ivica Bogosavljevic <ivica.bogosavljevic@imgtec.com>
Commit-Queue: Ivica Bogosavljevic <ivica.bogosavljevic@imgtec.com>
Cr-Commit-Position: refs/heads/master@{#46466}