matroskademux: Fix mismatched transfer characteristic

TransferCharacteristics(18) should be ARIB STD-B67 (HLG)
See https://www.webmproject.org/docs/container/#TransferCharacteristics

Also map more color primaries indexes which have been handled by matroska-mux.
21 jobs for fix-matroska-trc in 92 minutes and 23 seconds (queued for 13 seconds)
Status Job ID Name Coverage
  Preparation
passed #409659
gst indent

00:00:29

passed #409658
manifest

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  Build
passed #409665
build cerbero android universal

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build cerbero cross win32

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build cerbero cross win64

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passed #409664
build cerbero fedora x86_64

00:06:32

manual #409669
gst-ios-12.2 allowed to fail manual
build cerbero ios universal
passed #409668
gst-macos-10.14
build cerbero macos x86_64

00:10:28

passed #409660
build fedora x86_64

00:09:03

passed #409661
build nodebug fedora x86_64

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passed #409662
build static fedora x86_64

00:13:32

passed #409663
build static nodebug fedora x86_64

00:12:08

 
  Test
passed #409670
check fedora

00:08:08

passed #409801
integration testsuites fedora

00:13:26

passed #409673
valgrind bad

00:21:52

passed #409674
valgrind ges

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passed #409802
valgrind good

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failed #409671
integration testsuites fedora

00:31:32

failed #409672
valgrind good

00:26:03

 
  Integrate
passed #409675
android universal examples

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passed #409676
documentation

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