tpm2_eventlog_yaml.c Fix output of BlobDescription. #1876

Job	Run time
coverage-test	7m 13s
master-tss-build-test (gcc)	17m 7s
build-test (ubuntu-20.04, gcc)	6m 3s
master-tss-build-test (clang)	5m 3s
coverity-test	0s
build-test (ubuntu-20.04, clang)	5m 2s
build-test (fedora-30, gcc)	5m 52s
build-test (fedora-30, clang)	5m 22s
build-test (opensuse-leap, gcc)	6m 4s
build-test (opensuse-leap, clang)	5m 14s
build-test (fedora-32, gcc)	5m 49s
build-test (fedora-32, clang)	5m 6s
build-test (ubuntu-22.04, gcc)	10m 36s
build-test (ubuntu-22.04, clang)	10m 14s
	1h 34m 45s

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