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/audio/sony-headphones-client/gcc.patch

@@ -0,0 +1,19 @@
+diff --git a/SingleInstanceFuture.h b/SingleInstanceFuture.h
+index 8af733f..d2e6c49 100644
+--- a/SingleInstanceFuture.h
++++ b/SingleInstanceFuture.h
+@@ -12,13 +12,13 @@ template <class T>
+ class SingleInstanceFuture : public std::future<T>
+ {
+ public:
+-	SingleInstanceFuture<T>() = default;
++	SingleInstanceFuture(void) = default;
+ 	template<class Func, class... Args>
+ 	void setFromAsync(Func func, Args&&... args) noexcept(false);
+ 	bool ready();
+ 
+ private:
+-	SingleInstanceFuture<T>(std::future<T> other);
++	SingleInstanceFuture(std::future<T> other);
+ 	SingleInstanceFuture<T> operator=(std::future<T>& other);
+ };