fix: gcc 15 build, include <cstdint>

[gouzil]

Summary

本 PR 修复 GCC 15 下的构建问题，在 gloo/types.h 中补充直接依赖的 <cstdint> 头文件。

Changes

• 在 gloo/types.h 中添加 #include <cstdint>。

background

gloo/types.h 使用了固定宽度整数类型，但此前没有直接包含 <cstdint>。GCC 15 下该依赖不再能稳定通过其他头文件间接获得，因此会暴露缺失头文件导致的编译失败。

相关链接：

• https://gcc.gnu.org/cgit/gcc/commit/?id=3a817a4a5a6d94da9127af3be9f84a74e3076ee2
• https://gcc.gnu.org/pipermail/gcc-cvs/2024-August/407124.html
• gloo/types.h: include cstdint pytorch/gloo#452

[Copilot]

Pull request overview

This PR fixes a GCC 15 build issue by making gloo/types.h explicitly include <cstdint>, which is required for the fixed-width integer types used in the header (e.g., uint8_t, uint16_t, uint32_t, uint64_t). This aligns with the goal of removing reliance on transitive includes that GCC 15 no longer guarantees.

Changes:

• Add #include <cstdint> to gloo/types.h to ensure fixed-width integer types are directly available.

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