Add some specs for bitwise operators in Process::Status #1808

Job	Run time
specs (ubuntu, 3.0.6)	1m 29s
RuboCop	33s
specs (ubuntu, 3.1.4)	1m 29s
specs (ubuntu, 3.2.2)	1m 24s
specs (ubuntu, 3.3.0)	1m 26s
specs (macos, 3.0.6)	1m 27s
specs (macos, 3.1.4)	1m 22s
specs (macos, 3.2.2)	1m 9s
specs (macos, 3.3.0)	1m 24s
specs (windows, 3.0.6)	4m 14s
specs (windows, 3.1.4)	5m 10s
specs (windows, 3.2.2)	4m 28s
specs (windows, 3.3.0)	4m 14s
specs (ubuntu, 3.3.0, --enable-frozen-string-literal)	1m 24s
	31m 13s

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