update list of targets in the docs

doc/ca65.sgml

@@ -313,7 +313,7 @@ Here is a description of all the command line options:
   character constants into the character set of the target platform. The
   default for the target system is "none", which means that no translation
   will take place. The assembler supports the same target systems as the
-  compiler, see there for a list.
+  compiler, see <htmlurl url="ca65.html#option-t" name="there for a list">.
 
   Depending on the target, the default CPU type is also set. This can be
   overridden by using the <tt/<ref id="option--cpu" name="--cpu">/ option.

doc/cc65.sgml

@@ -610,27 +610,42 @@ Here is a description of all the command line options:
 
   <itemize>
   <item>none
+  <item>agat (a russian apple2 like computer)
   <item>apple2
   <item>apple2enh
   <item>atari
+  <item>atari2600
+  <item>atari5200
+  <item>atari7800
   <item>atarixl
   <item>atmos
+  <item>bbc
   <item>c16 (works also for the c116 with memory up to 32K)
   <item>c64
+  <item>c65
   <item>c128
   <item>cbm510 (CBM-II series with 40 column video)
   <item>cbm610 (all CBM-II II computers with 80 column video)
+  <item>creativision
+  <item>cx16
+  <item>gamate
   <item>geos-apple
   <item>geos-cbm
+  <item>geos (alias for geos-cbm)
+  <item>kim1
   <item>lunix
   <item>lynx
+  <item>mega65
   <item>nes
   <item>osic1p
+  <item>pce (PC engine)
   <item>pet (all CBM PET systems except the 2001)
   <item>plus4
+  <item>p6502
   <item>sim6502
   <item>sim65c02
   <item>supervision
+  <item>sym1
   <item>telestrat
   <item>vic20
   </itemize>