Update desc of mergelib configure option
Update desc of mergelib configure option

Also do not be fatal on clash with binfilter and just warn the user that
mergelib was disabled in favor of binfilter if he has both enabled.

Change-Id: I3b683a948e00b1134c10881c5ec442e6380f2822

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core