hg: macosx-port/macosx-port/hotspot: Don't run dsymutil on libjvm if the library hasn't been rebuilt

[astrange at apple.com]

Changeset: d19a6ce98f95
Author:    astrange
Date:      2011-09-19 20:22 -0400
URL:       http://hg.openjdk.java.net/macosx-port/macosx-port/hotspot/rev/d19a6ce98f95

Don't run dsymutil on libjvm if the library hasn't been rebuilt

Saves 3 minutes building hotspot.

! make/bsd/makefiles/vm.make