Fix location of libgccjit.so in the sysroot

Author: antoyo

.github/workflows/ci.yaml

@@ -133,7 +133,7 @@ jobs:
 
           # Since the Makefile uses the sysroot provided by rustup, we need to
           # manually copy libgccjit.so in this sysroot directory.
-          ln -s /usr/lib/libgccjit.so ~/.rustup/toolchains/$rust_version-x86_64-unknown-linux-gnu/lib/
+          ln -s /usr/lib/libgccjit.so ~/.rustup/toolchains/$rust_version-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/lib/x86_64-unknown-linux-gnu/libgccjit.so
 
           cd rustc_codegen_gcc
           echo 'gcc-path = "/usr/lib"' > config.toml