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/applications/radio/uhd/neon.patch

@@ -0,0 +1,19 @@
+Description: When building for armhf, enable NEON
+ NEON is part of the armhf baseline, so this will always be enabled on
+ armhf.
+Author: Paul Tagliamonte <paultag@debian.org>
+Bug-Debian: https://bugs.debian.org/873608
+Origin: vendor
+Last-Update: 2017-08-29
+
+--- uhd-3.10.2.0.orig/host/lib/convert/CMakeLists.txt
++++ uhd-3.10.2.0/host/lib/convert/CMakeLists.txt
+@@ -67,6 +67,8 @@ IF(HAVE_ARM_NEON_H AND (${CMAKE_SIZEOF_V
+         ${CMAKE_CURRENT_SOURCE_DIR}/convert_with_neon.cpp
+         ${CMAKE_CURRENT_SOURCE_DIR}/convert_neon.S
+     )
++
++    SET ( CMAKE_CXX_FLAGS "-mfpu=neon" )
+ ENDIF()
+ 
+ ########################################################################