multiple definition of main() problem in 3rdparty/openexr/IlmImf/b44ExpLogTable.cpp

exclude IlmImf/b44ExpLogTable.cpp from the build,

it's used originally to generate IlmImf/b44ExpLogTable.h, but it's not necessary for the library.(probably only here for documentation)

when included with static linking it introduces a problem with multiple definitions of main()