hg: jdk9/sandbox: 8154326: bash >(...) construct causes race conditions

[chris.hegarty at oracle.com]

Changeset: 6743a8e0cab7
Author:    erikj
Date:      2016-04-22 10:48 +0200
URL:       http://hg.openjdk.java.net/jdk9/sandbox/rev/6743a8e0cab7

8154326: bash >(...) construct causes race conditions
Reviewed-by: tbell, ihse

! make/InitSupport.gmk
! make/common/MakeBase.gmk