[ARM] PR68532 Fix up vzip recognition for big endian

[ARM] PR68532 Fix up vzip recognition for big endian

gcc/ChangeLog:

2016-02-09  Charles Baylis  <charles.baylis@linaro.org>

        PR target/68532
        * config/arm/arm.c (arm_evpc_neon_vzip): Allow for big endian lane
        order.
        * config/arm/arm_neon.h (vzipq_s8): Adjust shuffle patterns for big
        endian.
        (vzipq_s16): Likewise.
        (vzipq_s32): Likewise.
        (vzipq_f32): Likewise.
        (vzipq_u8): Likewise.
        (vzipq_u16): Likewise.
        (vzipq_u32): Likewise.
        (vzipq_p8): Likewise.
        (vzipq_p16): Likewise.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@233252 138bc75d-0d04-0410-961f-82ee72b054a4