configure.ac: Explicitely link with -ldl if dladdr() is found there. Before it was implicitely linked by the gmodule ...

Original commit message from CVS:
* configure.ac:
Explicitely link with -ldl if dladdr() is found there. Before it was
implicitely linked by the gmodule pkgconfig file but in glib 2.17.0
-ldl has moved from Libs to Libs.private. Fixes bug #536744.
2 files changed