update LDFLAGS use some more

Original commit message from CVS:

* configure.ac:
* gst/Makefile.am:
* gst/base/Makefile.am:
* gst/check/Makefile.am:
* gst/elements/Makefile.am:
* gst/net/Makefile.am:
update LDFLAGS use some more
11 files changed