Simplified sccp_lock.h / removed sccp_lock.c / Added include for asterisk/buildopts.h and asterisk/config.h (fixes #138)

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4859 43c1dc8c-776e-4df2-8ef1-6e829299be21