Any Android specific modifications to upstream libjpeg-turbo (2.0.0) should
be listed here:

(1) jconfig.h and jconfigint.h

These are included upstream as jconfig.h.in and jconfigint.h.in.
We have the option autogenerate these platform/version specific files (using
the libjpeg-turbo build system) or to manually create them.

Autogenerating these files on linux gets us most of the way, but we've needed
to add some multi-platform flexibility to the INLINE and SIZEOF_SIZE_T macros.