Cargo.toml: rename utility name as rqcow2

qcow2 is easy to confuse people with other qcow2 utilities, so
rename it.

Signed-off-by: Ming Lei <tom.leiming@gmail.com>

Cargo.toml

@@ -12,7 +12,7 @@ categories = [ "asynchronous", "filesystem" ]
 publish = true
 
 [[bin]]
-name = "qcow2"
+name = "rqcow2"
 path = "src/main.rs"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

tests/qcow2_util.rs

@@ -52,9 +52,9 @@ mod integretion {
         let rt = Runtime::new().unwrap();
         rt.block_on(async move {
             let exe_path = if cfg!(debug_assertions) {
-                format!("target/debug/qcow2")
+                format!("target/debug/rqcow2")
             } else {
-                format!("target/release/qcow2")
+                format!("target/release/rqcow2")
             };
             __test_qcow2_utility_convert(exe_path).await;
         });