Fix the build
Fix the build

With gcc 4.6.1, I get a build error in pango/ because the C++
parts in harfbuzz have not been compiles with -lPIC. Not sure
if this change is 100% correct, but it makes things build
successfully.

danny-ku/pango,Distrotech/pango,Distrotech/pango,Distrotech/pango,kari-lentz/alpha-pango,danny-ku/pango,danny-ku/pango,kari-lentz/alpha-pango,kari-lentz/alpha-pango,kari-lentz/alpha-pango