sys: Allow ignoring flags memebers as well · gtk-rs/gir@6754986

The following actions uses node12 which is deprecated and will be forced to run on node16: actions-rs/toolchain@v1, actions-rs/cargo@v1. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

The following actions uses Node.js version which is deprecated and will be forced to run on node20: actions-rs/toolchain@v1, actions-rs/cargo@v1. For more info: https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/

The process '/usr/bin/git' failed with exit code 128

struct `GDoubleIEEE754` is never constructed

struct `GFloatIEEE754` is never constructed

struct `GDoubleIEEE754_mpn` is never constructed

struct `GFloatIEEE754_mpn` is never constructed

struct `GStrvBuilder` is never constructed

struct `GUri` is never constructed

`glib-sys` (lib) generated 6 warnings

struct `GCClosure` is never constructed

struct `GBindingGroup` is never constructed

struct `GParamSpecString` is never constructed

The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

struct `GdkDmabufFormats` is never constructed

struct `GdkFileList` is never constructed

struct `GdkTextureDownloader` is never constructed

struct `GdkDeleteEvent` is never constructed

struct `GdkDmabufTexture` is never constructed

struct `GdkDmabufTextureBuilder` is never constructed

struct `GdkGLTextureBuilder` is never constructed

struct `GdkMotionEvent` is never constructed

struct `GdkProximityEvent` is never constructed

`gdk4-sys` (lib) generated 9 warnings

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