fontforge update for python

I found that configure didn't find the python.pc files using pkg-config without explicitly updating the PKG_CONFIG_PATH from the brew file. Sorry if this the incorrect way of going about this, no amount of adding depends_on 'python' was letting brew include python into the PKG_CONFIG_PATH.
The failing test is the call to AM_PATH_PYTHON([2.7])
https://github.com/fontforge/fontforge/blob/master/configure.ac#L209

For me, on osx 10.8 the above test fails to find python due to pkg-config failing to find it. I should mention that I am not experienced with brew, and apologise in advance if there is something I should be doing to have pkg-config find python which I am not doing :(

One reason I am looking at the python from homebrew is that I can get a known version that way. For example on osx 10.6 for which there are many users who are interested in HEAD fontforge, and sufficiently so that they might like to brew.

AFAIK the dependency is on python 2.7 able to be found through pkg-config. Though I have no experience testing the fontforge python module against the system python.