libxcrypt: update PV to match SRCREV

When SRCREV was updated, only libxcrypt-compat was renamed to match,
but not libxcrypt proper.

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
(cherry picked from commit 98c89359)
Signed-off-by: Steve Sakoman <steve@sakoman.com>