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/development/compilers/mrustc/patches/0003-echo-newlines.patch

@@ -0,0 +1,13 @@
+--- a/run_rustc/Makefile
++++ b/run_rustc/Makefile
+@@ -103,7 +103,9 @@
+ else
+ 	cp $(OUTDIR)build-rustc/release/rustc_binary $(BINDIR)rustc_binary
+ endif
+-	echo '#!/bin/sh\nd=$$(dirname $$0)\nLD_LIBRARY_PATH="$(abspath $(LIBDIR))" $$d/rustc_binary $$@' >$@
++	echo '#!$(shell which bash)' > $@
++	echo 'd=$$(dirname $$0)' >> $@
++	echo 'LD_LIBRARY_PATH="$(abspath $(LIBDIR))" $$d/rustc_binary $$@' >> $@
+ 	chmod +x $@
+ 
+ $(BINDIR)hello_world: $(RUST_SRC)test/run-pass/hello.rs $(LIBDIR)libstd.rlib $(BINDIR)rustc