[bsp] 修复 #10182 GD32生成Cmake工程错误的问题

[ThinkCodeStudio]

拉取/合并请求描述：(PR description)

[

为什么提交这份PR (why to submit this PR)

修复GD32生成Cmake工程报

AttributeError: 'CLVar' object has no attribute 'replace':
  File "E:\_rtthread\rt-thread\bsp\gd32\arm\gd32e503v-eval\SConstruct", line 60:
    DoBuilding(TARGET, objs)
  File "E:\_rtthread\rt-thread\tools\building.py", line 874:
    EndBuilding(target, program)
  File "E:\_rtthread\rt-thread\tools\building.py", line 983:
    GenTargetProject(program)
  File "E:\_rtthread\rt-thread\tools\building.py", line 947:
    CMakeProject(Env, Projects, GetOption('project-name'))
  File "E:\_rtthread\rt-thread\tools\cmake.py", line 342:
    GenerateCFiles(env, project, project_name)
  File "E:\_rtthread\rt-thread\tools\cmake.py", line 65:
    CFLAGS = env['CFLAGS'].replace('\\', "/").replace('\"', "\\\"")

的错误

你的解决方案是什么 (what is your solution)

将所有GD32 bsp 下 SConstruct 文件中的
CC = rtconfig.CC, CCFLAGS = rtconfig.CFLAGS, 替换成 CC = rtconfig.CC, CFLAGS = rtconfig.CFLAGS,

请提供验证的bsp和config (provide the config and bsp)

• BSP: gd32 all

• .config:

• action:

]

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• 本拉取/合并请求是一个草稿版本 This PR is for a code-review and is intended to get feedback
• 本拉取/合并请求是一个成熟版本 This PR is mature, and ready to be integrated into the repo

代码质量 Code Quality：

我在这个拉取/合并请求中已经考虑了 As part of this pull request, I've considered the following:

• 已经仔细查看过代码改动的对比 Already check the difference between PR and old code
• 代码风格正确，包括缩进空格，命名及其他风格 Style guide is adhered to, including spacing, naming and other styles
• 没有垃圾代码，代码尽量精简，不包含#if 0代码，不包含已经被注释了的代码 All redundant code is removed and cleaned up
• 所有变更均有原因及合理的，并且不会影响到其他软件组件代码或BSP All modifications are justified and not affect other components or BSP
• 对难懂代码均提供对应的注释 I've commented appropriately where code is tricky
• 代码是高质量的 Code in this PR is of high quality
• 已经使用formatting 等源码格式化工具确保格式符合RT-Thread代码规范 This PR complies with RT-Thread code specification
• 如果是新增bsp, 已经添加ci检查到.github/workflows/bsp_buildings.yml 详细请参考链接BSP自查

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Copilot reviewed 6 out of 17 changed files in this pull request and generated no comments.

Files not reviewed (11)

• bsp/gd32/arm/gd32103c-eval/SConstruct: Language not supported
• bsp/gd32/arm/gd32105c-eval/SConstruct: Language not supported
• bsp/gd32/arm/gd32105r-start/SConstruct: Language not supported
• bsp/gd32/arm/gd32205r-start/SConstruct: Language not supported
• bsp/gd32/arm/gd32303c-start/SConstruct: Language not supported
• bsp/gd32/arm/gd32303e-eval/SConstruct: Language not supported
• bsp/gd32/arm/gd32305r-start/SConstruct: Language not supported
• bsp/gd32/arm/gd32407v-lckfb/SConstruct: Language not supported
• bsp/gd32/arm/gd32407v-start/SConstruct: Language not supported
• bsp/gd32/arm/gd32450z-eval/SConstruct: Language not supported
• bsp/gd32/risc-v/gd32vf103r-start/SConstruct: Language not supported