Fix debug output VERBOSE_PREFIX_3

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4996 43c1dc8c-776e-4df2-8ef1-6e829299be21
Update debug output for sccp_handle_soft_key_set_req

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4997 43c1dc8c-776e-4df2-8ef1-6e829299be21
Update debug output for sccp_handle_soft_key_set_req (added free for outputStr)

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4998 43c1dc8c-776e-4df2-8ef1-6e829299be21