test-mok-mirror: minor bug fix #911

Job	Run time
f41 x64 build compile_commands.json	2m 44s
f41 x64 build	2m 3s
f41 aa64 cross-build	2m 6s
f40 x64 build	1m 56s
f40 aa64 cross-build	1m 50s
f39 x64 build	1m 54s
f41 arm cross-build	1m 55s
centos9 x64 build	1m 6s
f40 arm cross-build	1m 51s
centos8 x64 build	1m 12s
f39 arm cross-build	1m 53s
f39 ia32 build	1m 57s
f41 x64 cross-build	1m 59s
centos8 ia32 build	1m 13s
f40 x64 cross-build	1m 52s
f39 x64 cross-build	1m 54s
f41 ia32 cross-build	2m 5s
f40 ia32 cross-build	1m 50s
f39 ia32 cross-build	1m 56s
	35m 16s

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