hg: jdk9/sandbox: Move FindTests.gmk to common.

[magnus.ihse.bursie at oracle.com]

Changeset: 9a1b8369004d
Author:    ihse
Date:      2017-03-03 10:25 +0100
URL:       http://hg.openjdk.java.net/jdk9/sandbox/rev/9a1b8369004d

Move FindTests.gmk to common.

! make/Main.gmk
! make/common/FindTests.gmk < make/FindTests.gmk