os_mon - include HAMMER2-FS in df(1) for DragonFly #16730

Job	Run time
Build Erlang/OTP (64-bit)	9m 2s
Event File	4s
Build Erlang/OTP (iOS)	6m 9s
Build Erlang/OTP (32-bit)	10m 0s
Build Erlang/OTP (cross-compile)	14m 58s
Build Erlang/OTP (Windows)	13m 8s
Build Erlang/OTP (Types and Flavors)	8m 26s
Build Erlang/OTP (clang)	5m 44s
Build Erlang/OTP (macOS)	6m 12s
Build and check documentation	5m 21s
Run static analysis	6m 37s
Test Erlang/OTP (os_mon)	3m 33s
Test Erlang/OTP (system)	8m 2s
Release Erlang/OTP	0s
	1h 37m 16s

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