Use cgen from git

cd4df8a7 · Andreas Klöckner · 5710fca2 · cd4df8a7
Commit cd4df8a7 authored 9 years ago by Andreas Klöckner
--- a/requirements.txt
+++ b/requirements.txt
 git+git://github.com/inducer/pytools
 git+git://github.com/inducer/islpy
-cgen
+git+git://github.com/inducer/cgen
 git+git://github.com/pyopencl/pyopencl
 git+git://github.com/inducer/pymbolic