Fixed Windows jsglue Builds with Define for Built-in offsetof

[Redfire75369]

Adds -D_CRT_USE_BUILTIN_OFFSETOF for jsglue during the bindgen phase.
When building for aarch64-pc-windows-msvc with llvm 19, I had 12 errors as a result of offsetof not being constexpr compatible.

Examples of code which caused the errors:
https://searchfox.org/mozilla-central/source/js/public/Proxy.h#459
https://searchfox.org/mozilla-central/source/mfbt/HashFunctions.h#367

D:\a\spiderfire\spiderfire\target\aarch64-pc-windows-msvc\release\build\mozjs_sys-cbcf24600a385d3e\out\build\dist/include\mozilla/HashFunctions.h:367:27: error: constexpr function never produces a constant expression [-Winvalid-constexpr]
D:\a\spiderfire\spiderfire\target\aarch64-pc-windows-msvc\release\build\mozjs_sys-cbcf24600a385d3e\out\build\dist/include\mozilla/HashFunctions.h:371:27: error: constexpr function never produces a constant expression [-Winvalid-constexpr]
D:\a\spiderfire\spiderfire\target\aarch64-pc-windows-msvc\release\build\mozjs_sys-cbcf24600a385d3e\out\build\dist/include\js/Proxy.h:444:27: error: constexpr function never produces a constant expression [-Winvalid-constexpr]
D:\a\spiderfire\spiderfire\target\aarch64-pc-windows-msvc\release\build\mozjs_sys-cbcf24600a385d3e\out\build\dist/include\js/Proxy.h:449:19: error: static assertion expression is not an integral constant expression
D:\a\spiderfire\spiderfire\target\aarch64-pc-windows-msvc\release\build\mozjs_sys-cbcf24600a385d3e\out\build\dist/include\js/Proxy.h:461:41: error: constexpr function never produces a constant expression [-Winvalid-constexpr]
D:\a\spiderfire\spiderfire\target\aarch64-pc-windows-msvc\release\build\mozjs_sys-cbcf24600a385d3e\out\build\dist/include\js/Proxy.h:727:20: error: constexpr variable 'numSlots' must be initialized by a constant expression
D:\a\spiderfire\spiderfire\target\aarch64-pc-windows-msvc\release\build\mozjs_sys-cbcf24600a385d3e\out\build\dist/include\js/experimental/JitInfo.h:116:27: error: constexpr variable 'offsetOfArgv' must be initialized by a constant expression
D:\a\spiderfire\spiderfire\target\aarch64-pc-windows-msvc\release\build\mozjs_sys-cbcf24600a385d3e\out\build\dist/include\js/experimental/JitInfo.h:117:27: error: constexpr variable 'offsetOfArgc' must be initialized by a constant expression
C:\Program Files (x86)\Windows Kits\10\Include\10.0.26100.0\ucrt\stddef.h:47:31: error: static assertion expression is not an integral constant expression
D:\a\spiderfire\spiderfire\target\aarch64-pc-windows-msvc\release\build\mozjs_sys-cbcf24600a385d3e\out\build\dist/include\js/Proxy.h:727:20: error: constexpr variable 'numSlots' must be initialized by a constant expression
D:\a\spiderfire\spiderfire\target\aarch64-pc-windows-msvc\release\build\mozjs_sys-cbcf24600a385d3e\out\build\dist/include\js/Proxy.h:732:17: error: static assertion expression is not an integral constant expression

[jdm]

You will need to run cargo fmt.