i965: Shut up major()/minor() warnings.

i965: Shut up major()/minor() warnings.

Recent glibc generates this warning:

brw_performance_query.c:1648:13: warning: In the GNU C Library, "minor" is defined
 by <sys/sysmacros.h>. For historical compatibility, it is
 currently defined by <sys/types.h> as well, but we plan to
 remove this soon. To use "minor", include <sys/sysmacros.h>
 directly. If you did not intend to use a system-defined macro
 "minor", you should undefine it after including <sys/types.h>.

    min = minor(sb.st_rdev);

So, include sys/sysmacros.h to shut up the warning.

v2: Use the AC_HEADER_MAJOR defines to figure out the right header
    (thanks to Jonathan Gray for helping me not break non-glibc systems)

Reviewed-by: Matt Turner <mattst88@gmail.com> [v1]
Reviewed-by: Emil Velikov <emli.velikov@collabora.com>