hg: panama/dev: Fix path to Spp in gen-src.sh.

[vladimir.x.ivanov at oracle.com]

Changeset: 9ba0467a654a
Author:    vlivanov
Date:      2017-12-21 20:56 +0300
URL:       http://hg.openjdk.java.net/panama/dev/rev/9ba0467a654a

Fix path to Spp in gen-src.sh.

! src/jdk.incubator.vector/share/classes/jdk/incubator/vector/gen-src.sh