MFH: r522057

games/glest: fix build on GCC architectures

Building with GCC fails:
./mk/linux/glest_game/ai/ai_rule.cpp: In member function 'virtual bool Glest::Game::AiRuleMassiveAttack::test()':
./mk/linux/glest_game/ai/ai_rule.cpp:156:46: error: 'INT_MAX' was not declared in this scope

156 |   return ai->beingAttacked(attackPos, field, INT_MAX);
    |                                              ^~~~~~~

./mk/linux/glest_game/ai/ai_rule.cpp:19:1: note: 'INT_MAX' is defined in header '<climits>'; did you forget to '#include <climits>'?

 18 | #include "leak_dumper.h"
+++ |+#include <climits>
 19 |

./mk/linux/glest_game/ai/ai_rule.cpp: In member function 'virtual bool Glest::Game::AiRuleExpand::test()':
./mk/linux/glest_game/ai/ai_rule.cpp:815:22: error: 'INT_MAX' was not declared in this scope

815 |     int minDistance= INT_MAX;
    |                      ^~~~~~~

./mk/linux/glest_game/ai/ai_rule.cpp:815:22: note: 'INT_MAX' is defined in header '<climits>'; did you forget to '#include <climits>'?
...failed C++ ./build/powerpc64-portbld-freebsd12.1/optimize/glest_game/ai/ai_rule.o ...

Include climits in ai_rule.cpp to fix it.

PR: 242766
Approved by: mmokhi (maintainer timeout)
Approved by: portmgr (fix build blanket)