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/ocaml/4.04.nix

@@ -0,0 +1,21 @@
+import ./generic.nix {
+  major_version = "4";
+  minor_version = "04";
+  patch_version = "2";
+  sha256 = "0bhgjzi78l10824qga85nlh18jg9lb6aiamf9dah1cs6jhzfsn6i";
+
+  # If the executable is stipped it does not work
+  dontStrip = true;
+
+  patches = [
+    # Compatibility with Glibc 2.34
+    { url = "https://github.com/ocaml/ocaml/commit/6bcff7e6ce1a43e088469278eb3a9341e6a2ca5b.patch";
+      sha256 = "sha256:1hd45f7mwwrrym2y4dbcwklpv0g94avbz7qrn81l7w8mrrj3bngi"; }
+  ];
+
+  # Workaround build failure on -fno-common toolchains like upstream
+  # gcc-10. Otherwise build fails as:
+  #   ld: libcamlrun.a(startup.o):(.bss+0x800): multiple definition of
+  #     `caml_code_fragments_table'; libcamlrun.a(backtrace.o):(.bss+0x20): first defined here
+  NIX_CFLAGS_COMPILE = "-fcommon";
+}