Update rspirv/spirv to sdk-update branch with newer SPIR-V opcodes

The published rspirv 0.12.0+sdk-1.3.268.0 doesn't include newer SPIR-V
opcodes like UntypedPointersKHR, TypeUntypedPointerKHR, UntypedVariableKHR,
and ConditionalEntryPointINTEL that are required by the spirv-tools crate.
This patches rspirv and spirv to use the gfx-rs/rspirv sdk-update branch
which includes these opcodes (version 0.12.0+sdk-1.4.335.0).

Author: LegNeato

Cargo.lock

@@ -61,6 +61,12 @@ glam = { version = ">=0.30.8", default-features = false }
 libm = { version = "0.2.5", default-features = false }
 bytemuck = { version = "1.23", features = ["derive"] }
 
+# Patch rspirv/spirv to use newer versions with additional SPIR-V opcodes needed by spirv-tools.
+# TODO: Once a newer rspirv is published that includes these opcodes, switch to a crates.io version.
+[patch.crates-io]
+rspirv = { git = "https://github.com/gfx-rs/rspirv", branch = "sdk-update" }
+spirv = { git = "https://github.com/gfx-rs/rspirv", branch = "sdk-update", package = "spirv" }
+
 # Enable incremental by default in release mode.
 [profile.release]
 incremental = true