diff: mention dynamic_linking in extras/README

[Fergus Henderson]

Estimated hours taken: 0.25

extras/README:
	Describe the contents of the new `dynamic_linking' subdirectory.

Index: extras/README
===================================================================
RCS file: /home/staff/zs/imp/mercury/extras/README,v
retrieving revision 1.3
diff -u -r1.3 README
--- README	1998/12/04 02:37:53	1.3
+++ README	1998/12/07 01:54:05
@@ -12,6 +12,10 @@
 		A Mercury library package containing support for
 		complex and imaginary numbers.
 
+dynamic_linking
+		An interface to the C functions dlopen(), dlsym(), etc.
+		that are supported by most modern Unix systems.
+
 exceptions	A library module containing a (tentative)
 		exception handling interface for Mercury.
 

-- 
Fergus Henderson <fjh at cs.mu.oz.au>  |  "Binaries may die
WWW: <http://www.cs.mu.oz.au/~fjh>  |   but source code lives forever"
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