Fix overlinking for shared libs.

--- aalib-config.in.orig	Thu Apr 11 17:20:16 2013
+++ aalib-config.in	Thu Apr 11 17:22:14 2013
@@ -49,7 +49,7 @@ while test $# -gt 0; do
       ;;
 @ENABLE_SHARED_TRUE@    --libs)
 @ENABLE_SHARED_TRUE@      libdirs="-L@libdir@ @AALIB_RLD_FLAGS@"
-@ENABLE_SHARED_TRUE@      echo $libdirs @AALIB_LIBS@
+@ENABLE_SHARED_TRUE@      echo $libdirs -laa
 @ENABLE_SHARED_TRUE@      ;;
 @ENABLE_STATIC_TRUE@@ENABLE_SHARED_TRUE@    --static-libs)
 @ENABLE_STATIC_TRUE@@ENABLE_SHARED_FALSE@    --libs|--static-libs)