uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/tools/networking/photon/destdir.patch

@@ -0,0 +1,20 @@
+diff --git a/photon.py.old b/photon.py
+index 92498e4..f7e2c3d 100644
+--- a/photon.py.old
++++ b/photon.py
+@@ -185,7 +185,7 @@ if args.user_agent:
+     user_agents = args.user_agent.split(',')
+ else:
+     user_agents = []
+-    with open(os.getcwd() + '/core/user-agents.txt', 'r') as uas:
++    with open('DESTDIR/core/user-agents.txt', 'r') as uas:
+         for agent in uas:
+             user_agents.append(agent.strip('\n'))
+ 
+@@ -534,4 +534,4 @@ if args.export:
+ if not colors: # if colors are disabled
+     print ('%s Results saved in %s directory' % (good, output_dir))
+ else:
+-    print ('%s Results saved in \033[;1m%s\033[0m directory' % (good, output_dir))
+\ No newline at end of file
++    print ('%s Results saved in \033[;1m%s\033[0m directory' % (good, output_dir))