The values of F_RDLCK, F_WRLCK, F_UNLCK, F_EXLCK, F_SHLCK
differ between alpha and other linux architectures.

This patch allows to run "dpkg" (database lock).
Signed-off-by: NLaurent Vivier <laurent@vivier.eu>
Signed-off-by: NRichard Henderson <rth@twiddle.net>