[Autoconf] Add --no-undefined to compiler option

Update the compiler flags to enable the check of undefined function at link time.

It seems the option '-no-undefined' pass in libdleyna_core_1_0_la_LDFLAGS
is not enough. Using libtool, this option should be set to the compiler flags.

Signed-off-by: Ludovic Ferrandis <ludovic.ferrandis@intel.com>

Fixes #33.
Signed-off-by: Jussi Kukkonen <jussi.kukkonen@intel.com>