package/e2fsprogs: disable use of magic.h

RHEL 5.x does have magic.h, but it does not define all expected symbols.
In particular, the NO_CHECK symbols were only added in file 4.20 and RHEL
5.x is using 4.17. Don't use magic.h and libmagic when building host
package.

Suggested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>