Fix building on modern versions of Xcode and OS X.

Recent versions of XCode fail to compile the adb and fastboot binaries due to
two functions being deprecated in 10.9 (GetCurrentProcess and
ProcessInformationCopyDictionary), and the use of -Werrror.

This patch replaces the method implementations which use calls to methods
deprecated in the 10.9 SDK with versions which only call non-deprecated methods.

Change-Id: I855bf26aff45093ca9022924f3ecd1b80f2305a8
logd: throttle SELinux denials to 20/sec

Impose a limit of 20 selinux denials per second. Denials beyond
that point don't add any value, and have the potential to cause
crashes or denial of service attacks.

Do some other misc cleanup while I'm here.

Bug: 18341932
Change-Id: I6125d629ae4d6ae131d2e53bfa41e1f50277d402
Merge "Fix building on modern versions of Xcode and OS X."
Merge "logd: throttle SELinux denials to 20/sec"