test: split jpeg test data into header and cpp

test: split jpeg test data into header and cpp

Move static definitions of JPEG TestPatternData into the .cpp
so that multiple files can include the i965_jpeg_test_data.h
header file.  Otherwise, there will be "multiple definition"
compiler errors.

Also, change generateSolid to be inline for the same reason.

Signed-off-by: U. Artie Eoff <ullysses.a.eoff@intel.com>
Reviewed-by: Zhao Yakui <yakui.zhao@intel.com>