Thnx Rushang.Karia
to change openCV version
go to ../meta-clanton_v1.0.1/meta-oe/meta-oe/recipes-support/opencv directory
there is two file 1) opencv_2.4.3.bb and (2) opencv-samples_2.4.3.bb
Do all changes as explained below
1) replace previous SRC_URI line with this line SRC_URI = "http://sourceforge.net/projects/opencvlibrary/files/opencv-unix/2.4.9/opencv-2.4.9.zip/download"
2) remove line for patch file from "SRC_URI"
3) replace previous checksum with this which shown below
SRC_URI[md5sum] = "7f958389e71c77abdf5efe1da988b80c"
SRC_URI[sha256sum] = "803010848154988e9cbda8b3fa857fcbb27382c2946ed729e1a7e40600bb4c71"
4) replace all ${PV} with 2.4.9
and save it
Now you can run your bitbake