[#3561]

- Fixed Autotools mess in test/.
- Brought all the sub-libraries into a single library with LIBADD

Conflicts:

	sflphone-common/configure.ac
	sflphone-common/src/Makefile.am
	sflphone-common/src/audio/Makefile.am
	sflphone-common/src/video/Makefile.am
	sflphone-common/src/video/decoder/Makefile.am
	sflphone-common/test/Makefile.am