rpm: support RHEL 9

[wasphin]

What problem does this PR solve?

Issue Number:

Problem Summary:

Support to build rpm under RHEL9, tested for x86_64 and aarch64, details can be found here at: https://copr.fedorainfracloud.org/coprs/wasphin/brpc/build/4946201/

What is changed and the side effects?

Changed:
file mode changed to fix warning of:

*** WARNING: ./usr/src/debug/brpc-1.3.0-1.el9.aarch64/src/butil/recordio.h is executable but has no shebang, removing executable bit
*** WARNING: ./usr/src/debug/brpc-1.3.0-1.el9.aarch64/src/butil/recordio.cc is executable but has no shebang, removing executable bit
*** WARNING: ./usr/src/debug/brpc-1.3.0-1.el9.aarch64/src/brpc/protocol.h is executable but has no shebang, removing executable bit
*** WARNING: ./usr/src/debug/brpc-1.3.0-1.el9.aarch64/src/brpc/global.cpp is executable but has no shebang, removing executable bit
*** WARNING: ./usr/src/debug/brpc-1.3.0-1.el9.aarch64/src/brpc/controller.h is executable but has no shebang, removing executable bit
*** WARNING: ./usr/src/debug/brpc-1.3.0-1.el9.aarch64/src/brpc/channel.cpp is executable but has no shebang, removing executable bit

Side effects:

• Performance effects(性能影响):

• Breaking backward compatibility(向后兼容性):

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Check List:

• Please make sure your changes are compilable(请确保你的更改可以通过编译).
• When providing us with a new feature, it is best to add related tests(如果你向我们增加一个新的功能, 请添加相关测试).
• Please follow Contributor Covenant Code of Conduct.(请遵循贡献者准则).