hg: jdk/sandbox: 8213383: Wrap up pthread_cond_wait into a loop to workaround potential spurious wakeups

[chris.hegarty at oracle.com]

Changeset: 8a88bbeb1d1c
Author:    igerasim
Date:      2018-11-09 16:21 -0800
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/8a88bbeb1d1c

8213383: Wrap up pthread_cond_wait into a loop to workaround potential spurious wakeups
Reviewed-by: dlong, sspitsyn, dholmes, rriggs

! src/java.base/unix/native/libjsig/jsig.c