[docs] Fixed the version to 1.5.1 and did some minor changes to build options summary table
[docs] Fixed the version to 1.5.1 and did some minor changes to build options summary table

ethouris/srt,ethouris/srt,Haivision/srt,Haivision/srt,ethouris/srt,Haivision/srt,Haivision/srt,ethouris/srt