Adjust link order.

This matches a TS MUD from 1977, and is the same as TS MUD54 with the
addition of SGC. It's nearly the same as the Tenex order we had already.

There are a few differences between 54 and 56:

- CONST is new in 56;
- Three source files in 54 were merged into others in 56: TENTAB into
  READER, FLOATB into PRINT, and CHAN into FOPEN;
- DISPLA, which went between CREATE and SAVE in 54, is missing in 56.

src/mudsys/assem.xfile

@@ -12,7 +12,7 @@
 :midas;324 interr bin_interr
 :midas;324 nfree bin_nfree
 :midas;324 gchack bin_gchack
-:midas;324 readch bin_readch
+:midas;324 ipc bin_ipc
 :midas;324 agcmrk bin_agcmrk
 :midas;324 reader bin_reader
 :midas;324 print bin_print
@@ -27,9 +27,9 @@
 :midas;324 mudsqu bin_mudsqu
 :midas;324 fopen bin_fopen
 :midas;324 putget bin_putget
+:midas;324 readch bin_readch
 :midas;324 create bin_create
 :midas;324 save bin_save
-:midas;324 ipc bin_ipc
 :midas;324 agc bin_agc
 :midas;324 amsgc bin_amsgc
 :midas;324 initm bin_initm

src/mudsys/mud56.stink

@@ -11,7 +11,7 @@ MATOMHK BINL
 MINTERR BINL
 MNFREE BINL
 MGCHACK BINL
-MREADCH BINL
+MIPC BINL
 MAGCMRK BINL
 MREADER BINL
 MPRINT BINL
@@ -26,9 +26,9 @@ MMAIN BINL
 MMUDSQU BINL
 MFOPEN BINL
 MPUTGET BINL
+MREADCH BINL
 MCREATE BINL
 MSAVE BINL
-MIPC BINL
 MAGC BINL
 MAMSGC BINL
 MINITM BINL