Fix bad quoting in r87639. Caught by Arfrever.
diff --git a/configure.in b/configure.in
index 4d1ed94..bd2d027 100644
--- a/configure.in
+++ b/configure.in
@@ -1750,8 +1750,8 @@
 				esac
 		fi;;
 	NetBSD*|DragonFly*)
-		LDSHARED="$(CC) -shared"
-		LDCXXSHARED="$(CXX) -shared";;
+		LDSHARED='$(CC) -shared'
+		LDCXXSHARED='$(CXX) -shared';;
 	OpenUNIX*|UnixWare*)
 		if test "$GCC" = "yes" ; then
 			LDSHARED='$(CC) -shared'