client: fix bug that caused client to treat all jobs as 1-CPU #5235

Job	Run time
libs-build	6m 13s
apps-build	9m 14s
client-armv6-build	2m 53s
libs-cmake-build	7m 17s
client-arm-build	3m 36s
client-arm64-build	3m 51s
client-x86-build	3m 8s
client-x86_64-build	3m 27s
manager-build (assembleRelease)	4m 37s
manager-build (assembleXiaomi_release)	4m 22s
manager-build (assembleArmv6_release)	4m 26s
manager-build (jacocoTestReportDebug)	5m 52s
	58m 56s

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