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/chemistry/ergoscf/math-constants.patch

@@ -0,0 +1,19 @@
+diff --git a/source/dft/functionals.h b/source/dft/functionals.h
+index fde49ba..f7a61fc 100644
+--- a/source/dft/functionals.h
++++ b/source/dft/functionals.h
+@@ -59,6 +59,14 @@
+ #define EXTERN_C
+ #endif
+ 
++#ifndef M_PI
++#define M_PI 3.14159265358979323846
++#endif
++
++#ifndef M_SQRT2
++#define M_SQRT2        1.41421356237309504880
++#endif
++
+ typedef ergo_real real;
+ 
+ #if defined(FUNC_PRECISION) && FUNC_PRECISION == 1