cargo-c: Move recipe out of rust directory

cargo-c is an external Cargo extension used to build Rust libraries
with a C-compatible ABI and generate C headers and pkg-config files.
Since it is not part of the standard Rust toolchain, move it from the
rust directory to cargo-c under recipes-devtools for better organization
and maintainability.

Signed-off-by: Deepesh Varatharajan <Deepesh.Varatharajan@windriver.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/meta/recipes-devtools/rust/cargo-c-crates.inc b/meta/recipes-devtools/cargo-c/cargo-c-crates.inc
similarity index 100%
rename from meta/recipes-devtools/rust/cargo-c-crates.inc
rename to meta/recipes-devtools/cargo-c/cargo-c-crates.inc

diff --git a/meta/recipes-devtools/rust/cargo-c/0001-parking-lot-Use-libc-SYS_futex_time64-on-riscv32.patch b/meta/recipes-devtools/cargo-c/cargo-c/0001-parking-lot-Use-libc-SYS_futex_time64-on-riscv32.patch
similarity index 100%
rename from meta/recipes-devtools/rust/cargo-c/0001-parking-lot-Use-libc-SYS_futex_time64-on-riscv32.patch
rename to meta/recipes-devtools/cargo-c/cargo-c/0001-parking-lot-Use-libc-SYS_futex_time64-on-riscv32.patch

diff --git a/meta/recipes-devtools/rust/cargo-c_0.10.20+cargo-0.94.0.bb b/meta/recipes-devtools/cargo-c/cargo-c_0.10.20+cargo-0.94.0.bb
similarity index 100%
rename from meta/recipes-devtools/rust/cargo-c_0.10.20+cargo-0.94.0.bb
rename to meta/recipes-devtools/cargo-c/cargo-c_0.10.20+cargo-0.94.0.bb