libjpeg-turbo 2.1.5.1 and 3.0 beta2 have been released

[DRC]

These releases fix a regression in libjpeg-turbo 2.1.5 and 3.0 beta1
that caused an illegal instruction error on older x86 CPUs without AVX2
instructions if jpeg_start_*compress() was called in one thread and
jpeg_read_*() or jpeg_write_*() was called with the same libjpeg
instance in another thread. This issue was known to affect Chromium and
libvips. Note that the error could also be worked around on affected
systems by setting JSIMD_FORCESSE2=1 in the environment.


2.1.5.1:

Binaries and source tarball are here:
https://sourceforge.net/projects/libjpeg-turbo/files/2.1.5.1/

Change log is here:
https://github.com/libjpeg-turbo/libjpeg-turbo/releases/tag/2.1.5.1


3.0 beta2:

Binaries and source tarball are here:
https://sourceforge.net/projects/libjpeg-turbo/files/2.1.91%20%283.0%20beta2%29/

Change log is here:
https://github.com/libjpeg-turbo/libjpeg-turbo/releases/tag/2.1.91