OpenImageIO: [BUG] OIIO 2.5.7.0 fails to build on Fedora only on aarch64

Describe the bug

/builddir/build/BUILD/OpenImageIO-2.5.7.0/src/include/OpenImageIO/simd.h:4796:32: error: cannot convert ‘int16x8_t’ to ‘OpenImageIO_v2_5::simd::vint4::simd_t’ {aka ‘int32x4_t’} in initialization
 4796 |     simd_t val16 = vcombine_s16(vqmovn_s32(clamped), vdup_n_s16(0));
      |                    ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                                |
      |                                int16x8_t

Full log: https://kojipkgs.fedoraproject.org//work/tasks/1777/111791777/build.log

Perhaps this is do to the new SIMD updates? I never built 2.5.6.0 in the official repos but all test builds completed.

Platform information:

• OIIO branch/version: 2.5.7.0
• OS: Fedora Rawhide
• C++ compiler: gcc 13.2.1
• Any non-default build flags when you build OIIO: See full logs