[Omake] Rules execute in the wrong order

[Luis O'Shea]

I have run into a problem with rules executing (seemingly) in the
wrong order.  To make matters worse, the problem does not seem to be
deterministic -- sometimes everything just works.

I have

[OMakefile]
# set EPSTOPDF to "epstopdf" on Windows, to "sh epstopdf" on OS X
%.pdf: %.eps
  $(EPSTOPDF) $<

USEPDFLATEX=true
LaTeXDocument(a, $(EMPTY))
a.pdf: x.pdf
[/OMakefile]

Typing "omake a.pdf" sometimes results in pdflatex running *before*
epstopdf, resulting in a failed build.  "omake -k a.pdf" (or modifying
a.tex to not actually depend on x.pdf) allows x.pdf to be built (after
pdflatex runs).

As I mentioned, this seem to be non-deterministic.  The problematic
behaviour seems to happen more often when the last three lines of the
OMakefile actually appear in a .SUBDIRS OMakefile.

Thanks.