pkg/report: ignore the drop_nlink frame #14429

Job	Run time
aux	4m 36s
dashboard	2m 31s
build	11m 10s
arch (presubmit_arch_linux)	10m 53s
old	6m 23s
arch (presubmit_arch_freebsd)	6m 29s
race	7m 35s
race_dashboard	5m 8s
arch (presubmit_arch_netbsd)	4m 16s
arch (presubmit_arch_openbsd)	4m 4s
arch (presubmit_arch_darwin)	4m 16s
gvisor	4m 2s
arch (presubmit_arch_windows)	3m 24s
arch (presubmit_arch_executor)	3m 13s
	1h 18m 0s

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