Use the command line argument "api-segment { uid <nnn> gid <nnn> }" to
configure shared memory segment file ownership. Defaults to uid = gid
= 0. Shared-memory segments are explicitly set to 0770 mode, aka
"rwxrwx---".
Change-Id: Ic5d596b68139add61e7de6ace035c57dfd030111
Signed-off-by: Dave Barach <dave@barachs.net>