Add syscall for riscv64 architecture

Author: carlosedp

internal/remote/syscall_dup_linux_riscv64.go

@@ -0,0 +1,11 @@
+// +build linux,riscv64
+
+package remote
+
+import "syscall"
+
+// linux_riscv64 doesn't have syscall.Dup2 which ginkgo uses, so
+// use the nearly identical syscall.Dup3 instead
+func syscallDup(oldfd int, newfd int) (err error) {
+	return syscall.Dup3(oldfd, newfd, 0)
+}

internal/remote/syscall_dup_unix.go

@@ -1,4 +1,5 @@
 // +build !linux !arm64
+// +build !linux !riscv64
 // +build !windows
 // +build !solaris