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/filesystems/irods/irods_root_path.patch

@@ -0,0 +1,49 @@
+diff -r -u irods-4.2.0.orig/scripts/irods/paths.py irods-4.2.0/scripts/irods/paths.py
+--- irods-4.2.0.orig/scripts/irods/paths.py	2016-11-15 06:23:55.000000000 +0000
++++ irods-4.2.0/scripts/irods/paths.py	2016-12-21 15:17:07.437864606 +0000
+@@ -10,7 +10,7 @@
+     return os.path.join(root_directory(), 'var', 'lib', 'irods')
+ 
+ def config_directory():
+-    return os.path.join(root_directory(), 'etc', 'irods')
++    return os.path.join(os.path.abspath('/'), 'etc', 'irods')
+ 
+ def plugins_directory():
+     return os.path.join(root_directory(), 'usr', 'lib', 'irods', 'plugins')
+@@ -37,7 +37,7 @@
+ 
+ def version_path():
+     return os.path.join(
+-        irods_directory(),
++        home_directory(),
+         'VERSION.json')
+ 
+ def hosts_config_path():
+@@ -64,7 +64,7 @@
+ 
+ def log_directory():
+     return os.path.join(
+-        irods_directory(),
++        home_directory(),
+         'log')
+ 
+ def control_log_path():
+@@ -110,8 +110,7 @@
+ def server_bin_directory():
+     return os.path.join(
+         root_directory(),
+-        'usr',
+-        'sbin')
++        'bin')
+ 
+ def server_executable():
+     return os.path.join(
+@@ -132,7 +131,7 @@
+     return os.path.join(config_directory(), 'service_account.config')
+ 
+ def genosauth_path():
+-    return os.path.join(irods_directory(), 'clients', 'bin', 'genOSAuth')
++    return os.path.join(home_directory(), 'clients', 'bin', 'genOSAuth')
+ 
+ def irods_user_and_group_entries():
+     try: