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/hare/config-template.mk

@@ -0,0 +1,27 @@
+## Template to generate config.mk via substitute-all
+
+# set PREFIX externally
+BINDIR = $(PREFIX)/bin
+MANDIR = $(PREFIX)/share/man
+SRCDIR = $(PREFIX)/src
+STDLIB = $(SRCDIR)/hare/stdlib
+
+HAREPATH = $(SRCDIR)/hare/stdlib:$(SRCDIR)/hare/third-party
+
+## Build configuration
+
+# Platform to build for
+PLATFORM = @platform@
+ARCH = @arch@
+
+# External tools and flags
+HAREC = harec
+HAREFLAGS = @hareflags@
+QBE = qbe
+AS = as
+LD = ld
+AR = ar
+SCDOC = scdoc
+
+# Where to store build artifacts
+# set HARECACHE externally