o32.S (ffi_call_O32, [...]): Use jalr instead of jal.

        * src/mips/o32.S (ffi_call_O32, ffi_closure_O32): Use jalr instead
        of jal.  Use an absolute encoding for the frame information.

        * configure.host: Enable the interpreter for mips*-*-linux*.

From-SVN: r91116