trylink: produce even more info about final link stage

trylink: explain how to modify link and drastically decrease amount
  of padding (unfortunately, needs hand editing ATM).
*: add ALIGN1 / ALIGN2 to global strings and arrays of bytes and shorts

size saving: 0.5k

networking/udhcp/options.c

@@ -52,7 +52,7 @@ const struct dhcp_option dhcp_options[] = {
 };
 
 /* Lengths of the different option types */
-const unsigned char option_lengths[] = {
+const unsigned char option_lengths[] ALIGN1 = {
 	[OPTION_IP] =      4,
 	[OPTION_IP_PAIR] = 8,
 	[OPTION_BOOLEAN] = 1,