Log Message:
jbig2dec: update to 0.20.

Version 0.20 (2023 August 28)

* Move definition of inline macro so that it doesn't cause
  linker errors during cross-compilation.

* Fix OSS-fuzz issue 10862, a memory leak, by freeing image
  resources upon error.

* Fix a bug where a buffer was accessed without considering
  alignment requirements on architectures such as SPARC.

* Fix compiler warnings.

* Improve custom memory allocator used in testing to restricting
  memory usage.

* Use silent automake rules when compiling as a separate project.