Mark all these scripts executable.

Cc: Mark Rutland
Cc: Peter Zijlstra (Intel)
Cc: Will Deacon
Cc: linux-arm-kernel@lists.infradead.org
Cc: Catalin Marinas
Cc: linuxdrivers@attotech.com
Cc: dvyukov@google.com
Cc: boqun.feng@gmail.com
Cc: arnd@arndb.de
Cc: aryabinin@virtuozzo.com
Cc: glider@google.com
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar