Commit 021ecd8b breaks the build for
PPC hosts because it uses uintptr_t without the necessary include file.

uintptr_t is defined in stdint.h, so add this include.

Cc: Alexander Graf <agraf@suse.de>
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>