source3/wscript: Fix detection of major/minor macros
These macros are only available via <sys/sysmacros.h> as of glibc
commit
e16deca62e16f645213dffd4ecd1153c37765f17 ("[BZ #19239] Don't
include sys/sysmacros.h from sys/types.h."), which went into
glibc 2.28.
This is different from the usual C99 cleanups because it changes
the configure check result with existing compilers that usually
accept implicit function declarations.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15281
Signed-off-by: Florian Weimer <fweimer@redhat.com>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>