fix env chdir in justfile

in justfile we have several `env chdir` but they should be
`env --chdir`. this is the fix. also it fixes some lint errors
in stage0_bin_tdx

Change-Id: I8feede137f6776ee3e5cda493b6d75b902c9abdb

justfile

@@ -319,22 +319,22 @@ cargo-clippy:
     #!/bin/sh
     for workspace in $({{CARGO_WORKSPACE_LIST_CMD}})
     do
-        env chdir=$workspace cargo clippy --all-features --all-targets --no-deps -- --deny=warnings
+        env --chdir=$(dirname "$workspace") cargo clippy --all-features --all-targets --no-deps -- --deny=warnings
     done
 
 
 cargo-deny:
     #!/bin/sh
     for workspace in $({{CARGO_WORKSPACE_LIST_CMD}})
     do
-        env chdir=$workspace cargo deny check
+        env --chdir=$(dirname "$workspace") cargo deny check
     done
 
 cargo-udeps:
     #!/bin/sh
     for workspace in $({{CARGO_WORKSPACE_LIST_CMD}})
     do
-        env chdir=$workspace cargo udeps --all-targets --backend=depinfo --workspace
+        env --chdir=$(dirname "$workspace") cargo udeps --all-targets --backend=depinfo --workspace
     done
 
 

stage0_bin_tdx/src/main.rs

@@ -30,7 +30,7 @@ mod asm;
 #[no_mangle]
 static mut TEST_DATA: u32 = 0;
 
-static HELLO_OAK: &'static str = "Hello from stage0_bin_tdx!";
+static HELLO_OAK: &str = "Hello from stage0_bin_tdx!";
 
 fn write_u8_to_serial(c: u8) {
     // wait_for_empty_output
@@ -39,14 +39,14 @@ fn write_u8_to_serial(c: u8) {
             break;
         }
     }
-    io_write_u8(0x3f8, c as u8).unwrap();
+    io_write_u8(0x3f8, c).unwrap();
 }
 
 fn write_single_hex(c: u8) {
     if c < 0xa {
-        write_u8_to_serial(c + ('0' as u8));
+        write_u8_to_serial(c + (b'0'));
     } else {
-        write_u8_to_serial(c - 10 + ('a' as u8));
+        write_u8_to_serial(c - 10 + (b'a'));
     }
 }