Add lib support as an option

Some images like `criu` will have extra libs that it requires.  This
adds lib support via LD_LIBRARY_PATH and InstallOpts

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

vendor/github.com/containerd/go-runc/command_linux.go

@@ -18,6 +18,7 @@ package runc
 
 import (
 	"context"
+	"os"
 	"os/exec"
 	"syscall"
 )
@@ -31,6 +32,7 @@ func (r *Runc) command(context context.Context, args ...string) *exec.Cmd {
 	cmd.SysProcAttr = &syscall.SysProcAttr{
 		Setpgid: r.Setpgid,
 	}
+	cmd.Env = os.Environ()
 	if r.PdeathSignal != 0 {
 		cmd.SysProcAttr.Pdeathsig = r.PdeathSignal
 	}

vendor/github.com/containerd/go-runc/command_other.go

@@ -20,6 +20,7 @@ package runc
 
 import (
 	"context"
+	"os"
 	"os/exec"
 )
 
@@ -28,5 +29,7 @@ func (r *Runc) command(context context.Context, args ...string) *exec.Cmd {
 	if command == "" {
 		command = DefaultCommand
 	}
-	return exec.CommandContext(context, command, append(r.args(), args...)...)
+	cmd := exec.CommandContext(context, command, append(r.args(), args...)...)
+	cmd.Env = os.Environ()
+	return cmd
 }