Make libpod build on 32-bit systems

Signed-off-by: Matthew Heon <matthew.heon@gmail.com>

Closes: #324
Approved by: rhatdan

libpod/finished_32.go

@@ -0,0 +1,16 @@
+// +build arm 386
+
+package libpod
+
+import (
+	"os"
+	"syscall"
+	"time"
+)
+
+// Get created time of a file
+// Only works on 32-bit OSes
+func getFinishedTime(fi os.FileInfo) time.Time {
+	st := fi.Sys().(*syscall.Stat_t)
+	return time.Unix(int64(st.Ctim.Sec), int64(st.Ctim.Nsec))
+}