science/cdo: Unbreak build

... by fixing the C++ error.

Reported by:	fallout
Approved by:	portmgr (unbreak)

science/cdo/files/patch-src_cdo__fft.cc

@@ -0,0 +1,13 @@
+- workaround for: https://code.mpimet.mpg.de/issues/10967
+- this fixes compilation failure when std::swap isn't completely defined and it fails with:
+- ld: error: undefined hidden symbol: std::__1::enable_if<(is_move_constructible<double>::value) && (is_move_assignable<double>::value), void>::type std::__1::swap<double>(double&, double&)
+
+--- src/cdo_fft.cc.orig	2022-09-17 16:10:25 UTC
++++ src/cdo_fft.cc
+@@ -1,5 +1,6 @@
+ // This source code is copied from PINGO version 1.5
+ 
++#include <algorithm>
+ #include <cmath>
+ 
+ namespace cdo