Allow system UID to setenforce and set booleans for SELinux.

Allow system UID to setenforce and set booleans for SELinux.
Boolean ownerships must also be reset upon policy reload as
the boolean files in selinuxfs are regenerated to match the new policy.
Handle policy reloads within ueventd rather than restarting it.

Restarting ueventd upon policy reloads has reportedly created
stability problems for some users and could cause events to be lost.
Stop restarting ueventd and instead handle policy reloads within ueventd.

Also stops restarting installd upon policy reloads.

Change-Id: Ic7f310d69a7c420e48fbc974000cf4a5b9ab4a3b
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Revert "Apply strict SELinux checking of PROT_EXEC on mmap/mprotect calls."

This reverts commit 0ad86b4ec9818a2665d06d97039702bc266ca386.
Revert "init: Fix serial number display for semc msm7x30 devices"

This is properly fixed in kernel now. Get rid of this device-specific code.

This reverts commit 5ac7417f81ed6646e0132991095e8f1fd974abaa.

Change-Id: Id81062d3268de6dd021ad90a56480133c487aa62