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/science/biology/dcm2niix/dont-fetch-external-libs.patch

@@ -0,0 +1,36 @@
+diff --git a/SuperBuild/External-CLOUDFLARE-ZLIB.cmake b/SuperBuild/External-CLOUDFLARE-ZLIB.cmake
+index 9f064eb..fe74df5 100644
+--- a/SuperBuild/External-CLOUDFLARE-ZLIB.cmake
++++ b/SuperBuild/External-CLOUDFLARE-ZLIB.cmake
+@@ -1,8 +1,5 @@
+-set(CLOUDFLARE_BRANCH gcc.amd64) # Cloudflare zlib branch
+-
+ ExternalProject_Add(zlib
+-    GIT_REPOSITORY "${git_protocol}://github.com/ningfei/zlib.git"
+-    GIT_TAG "${CLOUDFLARE_BRANCH}"
++    URL file://@cloudflareZlib@
+     SOURCE_DIR cloudflare-zlib
+     BINARY_DIR cloudflare-zlib-build
+     CMAKE_ARGS
+diff --git a/SuperBuild/SuperBuild.cmake b/SuperBuild/SuperBuild.cmake
+index 2a0a956..81354a7 100644
+--- a/SuperBuild/SuperBuild.cmake
++++ b/SuperBuild/SuperBuild.cmake
+@@ -1,17 +1,3 @@
+-# Check if git exists
+-find_package(Git)
+-if(NOT GIT_FOUND)
+-    message(FATAL_ERROR "Cannot find Git. Git is required for Superbuild")
+-endif()
+-
+-# Use git protocol or not
+-option(USE_GIT_PROTOCOL "If behind a firewall turn this off to use http instead." ON)
+-if(USE_GIT_PROTOCOL)
+-    set(git_protocol "git")
+-else()
+-    set(git_protocol "https")
+-endif()
+-
+ # Basic CMake build settings
+ if(NOT CMAKE_BUILD_TYPE)
+     set(CMAKE_BUILD_TYPE "Release" CACHE STRING