cmd: Remove <common.h> and add needed includes

Remove <common.h> from all "cmd/" files and when needed add
missing include files directly.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/cmd/clone.c b/cmd/clone.c
index a906207..1f3cff1 100644
--- a/cmd/clone.c
+++ b/cmd/clone.c
@@ -4,11 +4,11 @@
  *
  */
 
-#include <common.h>
 #include <command.h>
 #include <malloc.h>
 #include <part.h>
 #include <blk.h>
+#include <time.h>
 #include <vsprintf.h>
 
 #define BUFSIZE (1 * 1024 * 1024)