vendor libsecret

The libsecret-rs crate is unmaintained, so I'm vendoring it for
now. Bumping the glib version turned out to be enough.

The exact process I used was:
1. Cloning the repository
2. Making changes
3. `cargo build` to ensure it works
4. `cargo package --no-verify` (b/c it tries to build all crates
separately instead of the entire workspace as a whole)
5. `mkdir libsecret/sys -p`
6. `tar --strip-components 1 -C libsecret -xvf ../libsecret-rs/target/package/libsecret-0.6.0.crate`
7. `tar --strip-components 1 -C libsecret/sys -xvf ../libsecret-rs/target/package/libsecret-sys-0.6.0.crate`

Then `Cargo.toml` is modified to ensure the libsecret and its `-sys`
crate build out of my vendored sources.

In the future, if I gain maintainership of the `libsecret` crate, I
could just revert this commit to make it point back to the upstream.

1 files changed, 15 insertions, 0 deletions

diff --git a/libsecret/src/auto/schema_attribute.rs b/libsecret/src/auto/schema_attribute.rs
new file mode 100644
index 0000000..be20632
--- /dev/null
+++ b/libsecret/src/auto/schema_attribute.rs
@@ -0,0 +1,15 @@
+// This file was generated by gir (https://github.com/gtk-rs/gir)
+// from
+// from gir-files (https://github.com/gtk-rs/gir-files.git)
+// DO NOT EDIT
+
+glib::wrapper! {
+    #[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
+    pub struct SchemaAttribute(Boxed<ffi::SecretSchemaAttribute>);
+
+    match fn {
+        copy => |ptr| glib::gobject_ffi::g_boxed_copy(ffi::secret_schema_attribute_get_type(), ptr as *mut _) as *mut ffi::SecretSchemaAttribute,
+        free => |ptr| glib::gobject_ffi::g_boxed_free(ffi::secret_schema_attribute_get_type(), ptr as *mut _),
+        type_ => || ffi::secret_schema_attribute_get_type(),
+    }
+}