release.sh changes & fixes

	. source release.functions with explicit path
	. make xargs touch not fail (due to too long invocations
	  and spaces in paths)

Change-Id: I448b96cebd641bf2c7b86ecbb3d1f1cb568e4f70
VFS: convert EINTR to EAGAIN for nonblocking I/O

The conversion was never properly implemented for asynchronous
character drivers, and got lost during the removal of the
synchronous character protocol.

Change-Id: Ib858806859aa7a52d6b391d4c6c521a2be361fdd