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/os-specific/linux/systemd/0018-pkg-config-derive-prefix-from-prefix.patch

@@ -0,0 +1,33 @@
+From 968bd0c7bc058a4b05b6457f9ff20d02b70c9852 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?J=C3=B6rg=20Thalheim?= <joerg@thalheim.io>
+Date: Sun, 6 Dec 2020 08:34:19 +0100
+Subject: [PATCH 18/19] pkg-config: derive prefix from --prefix
+
+Point prefix to the one configured, instead of `/usr` `systemd` has limited
+support for making the pkgconfig prefix overridable, and interpolates those
+values later down.
+
+So we only need to patch this one value to get the correct paths.
+See systemd/systemd@bc4e6e27922a2873985ab9367d79fb099f70b505 for details.
+
+Co-Authored-By: Florian Klink <flokli@flokli.de>
+---
+ src/core/systemd.pc.in | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/core/systemd.pc.in b/src/core/systemd.pc.in
+index 162432e77f..2fc20daf03 100644
+--- a/src/core/systemd.pc.in
++++ b/src/core/systemd.pc.in
+@@ -11,7 +11,7 @@
+ # considered deprecated (though there is no plan to remove them). New names
+ # shall have underscores.
+ 
+-prefix=/usr
++prefix={{PREFIX}}
+ root_prefix={{ROOTPREFIX_NOSLASH}}
+ rootprefix=${root_prefix}
+ sysconf_dir={{SYSCONF_DIR}}
+-- 
+2.34.0
+