Merge pull request #1594 from jmatthew/openbsd-riscv64

Merge pull request #1594 from jmatthew/openbsd-riscv64 · shirou/gopsutil@8aeaf16

Original file line number	Diff line number	Diff line change
`@@ -32,7 +32,7 @@ can be skipped.`
`32`	`32`	`- Linux i386/amd64/arm(raspberry pi)`
`33`	`33`	`- Windows i386/amd64/arm/arm64`
`34`	`34`	`- Darwin amd64/arm64`
`35`		`-- OpenBSD amd64 (Thank you @mpfz0r!)`
	`35`	`+- OpenBSD i386/amd64/armv7/arm64/riscv64 (Thank you @mpfz0r!)`
`36`	`36`	`- Solaris amd64 (developed and tested on SmartOS/Illumos, Thank you`
`37`	`37`	`@jen20!)`
`38`	`38`