cmake: use project name instead of hardcoded name

This commit offers to give an arbitrary name to the Rust application
project under CMake.

Indeed, before this commit, the CMake project for the Rust application
had the name `librustapp`. Now, it can be set with any value.

CMakeLists.txt

@@ -86,8 +86,9 @@ function(rust_cargo_application)
   endif()
   set(BUILD_LIB_DIR "${CMAKE_CURRENT_SOURCE_DIR}/${RUST_TARGET}/${RUST_BUILD_TYPE}")
 
+  set(RUST_LIBRARY_NAME "${CMAKE_PROJECT_NAME}")
   set(CARGO_TARGET_DIR "${CMAKE_CURRENT_BINARY_DIR}/rust/target")
-  set(RUST_LIBRARY "${CARGO_TARGET_DIR}/${RUST_TARGET}/${RUST_BUILD_TYPE}/librustapp.a")
+  set(RUST_LIBRARY "${CARGO_TARGET_DIR}/${RUST_TARGET}/${RUST_BUILD_TYPE}/lib${RUST_LIBRARY_NAME}.a")
   set(SAMPLE_CARGO_CONFIG "${CMAKE_CURRENT_BINARY_DIR}/rust/sample-cargo-config.toml")
 
   # The generated C binding wrappers. These are bindgen-generated wrappers for the inline functions