Merge branch 'upstream-jpeg' into HEAD

ThirdParty/jpeg/vtkjpeg/.gitattributes

ThirdParty/jpeg/vtkjpeg/CMakeLists.txt

ThirdParty/jpeg/vtkjpeg/LICENSE.md

ThirdParty/jpeg/vtkjpeg/README.ijg

ThirdParty/jpeg/vtkjpeg/README.kitware.md

ThirdParty/jpeg/vtkjpeg/README.md

ThirdParty/jpeg/vtkjpeg/jaricom.c

ThirdParty/jpeg/vtkjpeg/jcapimin.c

ThirdParty/jpeg/vtkjpeg/jcapistd.c

ThirdParty/jpeg/vtkjpeg/jcarith.c

ThirdParty/jpeg/vtkjpeg/jccoefct.c

ThirdParty/jpeg/vtkjpeg/jccolext.c

ThirdParty/jpeg/vtkjpeg/jccolor.c

ThirdParty/jpeg/vtkjpeg/jcdctmgr.c

ThirdParty/jpeg/vtkjpeg/jchuff.c

ThirdParty/jpeg/vtkjpeg/jchuff.h

ThirdParty/jpeg/vtkjpeg/jcicc.c

ThirdParty/jpeg/vtkjpeg/jcinit.c

ThirdParty/jpeg/vtkjpeg/jcmainct.c

ThirdParty/jpeg/vtkjpeg/jcmarker.c