[mips] Implement alias for 'and' and 'or' instructions for all ISAs.

Summary:
Examples:
and $2, 4 <=> andi $2, $2, 4
or $2, 4 <=> ori $2, $2, 4

Reviewers: dsanders

Reviewed By: dsanders

Differential Revision: http://reviews.llvm.org/D4155