If device does not support double, returns immediately.
Double floating points are not default supported by OpenCL.
Updated Google Test to 1.7.0.
fixed ocl::bitwise_not in case of CV_8UC1, CV_8UC2
Merge pull request #1547 from SpecLad:gtest-1.7
enabled ocl::norm perf test
ocl: dynamic load of OpenCL libraries

Support functions from OpenCL 1.1 / OpenCL 1.2
ocl: cl_runtime: added autogenerated code
Merge pull request #1548 from ilya-lavrenov:ocl_bitwise_not
Merge pull request #1549 from ilya-lavrenov:ocl_perf_norm
removed invalid comment
Merge pull request #1542 from alalek:cl_runtime
Merge pull request #1507 from pengx17:2.4_fix_test