Log Message:
Rework cpuid function to use gnuc __get_cpuid (requiring at least gcc 4.3)
This get's over issues such as encountered with PIC builds.
Upstream issue : https://github.com/openexr/openexr/issues/128
Revbump due to new dependency on GCC_REQD+= 4.3
(additional patches available upon request for bmake test target)