systemtap: Add missing memory flag to fix stap module compilation

systemtap: Add missing memory flag to fix stap module compilation

The 4.4 kernel removed some memory flag definitions, which cause
module compilation errors, rendering sytemtap essentially useless in
krogoth.

The problem is fixed in systemtap 3.0 and therefore in master, but as
mentioned in Systemtap BZ1285348, the fix for older versions is this
patch.

Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>