math/gismo: Fix build on non-amd64 architectures

.. by defining HOST_NAME_MAX.
HOST_NAME_MAX is only used on non-amd64 architectures in gismo.

Reported by:	fallout

math/gismo/files/patch-src_gsCore_gsSysInfo.cpp

@@ -0,0 +1,15 @@
+- workaround for the compilation failure on non-amd64 architectures
+- due to the use of missing value HOST_NAME_MAX only on these architectures
+
+--- src/gsCore/gsSysInfo.cpp.orig	2024-01-12 03:28:55 UTC
++++ src/gsCore/gsSysInfo.cpp
+@@ -30,6 +30,9 @@
+ #   endif
+ #endif
+ 
++#include <sys/param.h>
++#define HOST_NAME_MAX MAXHOSTNAMELEN
++
+ namespace gismo
+ {
+