Don't install the Java shmem tools if we aren't building Java support.

Thanks to Paul Hargrove for noticing.

Taken from open-mpi/ompi@064a241145d7384ca8d759c5ef41261d0f242e94

@jsquyres please comment
It isn’t - the issue was that there are no shmem java bindings in 1.8, and so that conditional is never defined

> On Dec 12, 2014, at 1:23 PM, Dave Goodell <notifications@github.com> wrote:
> 
> In oshmem/tools/wrappers/Makefile.am <https://github.com/open-mpi/ompi-release/pull/115#discussion-diff-21774268>:
> 
> > @@ -24,8 +24,10 @@ install-exec-hook:
> >  	(cd $(DESTDIR)$(bindir); rm -f oshcc$(EXEEXT); $(LN_S) mpicc$(EXEEXT) oshcc$(EXEEXT))
> >  	(cd $(DESTDIR)$(bindir); rm -f shmemfort$(EXEEXT); $(LN_S) mpifort$(EXEEXT) shmemfort$(EXEEXT))
> >  	(cd $(DESTDIR)$(bindir); rm -f oshfort$(EXEEXT); $(LN_S) mpifort$(EXEEXT) oshfort$(EXEEXT))
> > +if OMPI_WANT_JAVA_BINDINGS
> Why would it be #if instead of if? This is an automake conditional, right?
> 
> http://www.gnu.org/software/automake/manual/html_node/Usage-of-Conditionals.html#Usage-of-Conditionals <http://www.gnu.org/software/automake/manual/html_node/Usage-of-Conditionals.html#Usage-of-Conditionals>
> —
> Reply to this email directly or view it on GitHub <https://github.com/open-mpi/ompi-release/pull/115/files#r21774268>.
>