laserproxy: add nix build

Change-Id: If93f4ba69afa028fed9098663a523f46d6134f7c
diff --git a/hswaw/laserproxy/nix-disable-uwsgi.patch b/hswaw/laserproxy/nix-disable-uwsgi.patch
new file mode 100644
index 0000000..02a69b7
--- /dev/null
+++ b/hswaw/laserproxy/nix-disable-uwsgi.patch
@@ -0,0 +1,11 @@
+diff --git a/third_party/py/requirements.txt b/third_party/py/requirements.txt
+index 94765d7..d7f0f3d 100644
+--- a/third_party/py/requirements.txt
++++ b/third_party/py/requirements.txt
+@@ -42,6 +42,5 @@ six==1.12.0
+ SQLAlchemy==1.3.8
+ sqlparse==0.3.0
+ urllib3==1.25.3
+-uWSGI==2.0.18
+ Werkzeug==0.15.5
+ WTForms==2.2.1