FIND_PACKAGE_HANDLE_STANDARD_ARGS handles REQUIRE only correct if
called with the same package name as find_package was called with.
The returned xxxx_FOUND is still uppercase.
A new CMake utility (FindCUnit.cmake) has been written to easy finding
of CUnit headers and libraries in a portable way.
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>