mxcl/homebrew — pull request #14170 by 2bits (2012-08-14 07:12:35+00:00)
Title: svg2pdf: fix missing cairo.pc

svg2pdf has a dep on libsvg-cairo. When pkg-config goes to spit
out what it knows about libsvg-cairo, it needs to find `cairo.pc`.
Add the user's X11 pkgconfig path to PKG_CONFIG_PATH so that the
build can find `cairo.pc`.

Fixes #13766