Honor the result of AC_SEARCH_LIBS() and don't hardcode linking with
libstdc++.

Index: configure
--- configure.orig
+++ configure
@@ -12346,7 +12346,7 @@ else
 fi
 
 
-    LIBS="-lz -lstdc++ $LIBS"
+#   LIBS="-lz -lstdc++ $LIBS"
 
 
 $as_echo "#define ENABLE_ID3LIB 1" >>confdefs.h
