Add pointer to motorola 68k info.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@17178 138bc75d-0d04-0410-961f-82ee72b054a4

gcc/LITERATURE

@@ -59,3 +59,9 @@ Collected papers/sites on standards, compilers, optimization, etc.
 - DWARF v2 spec and sample implementation
 
 	ftp://sgigate.sgi.com/pub/dwarf/
+
+
+- Various m68k info (including user guides in pdf format)
+
+	http://www.mot.com/SPS/HPESD/prod/0X0
+