* gcc.dg/tree-ssa/pr31261.c [int16]: Change expected unsigned type.
        * gcc.dg/pr46647.c, gcc.dg/pr53265.c: Use avr-*-*, not avr*-*-*.
        * gcc.dg/strlenopt-10.c, strlenopt-11.c: Likewise.
        * gcc.dg/strlenopt-13.c: Likewise.
        * gcc.dg/tree-ssa/pr42585.c: Likewise.