fix: apply clippy fixes

Signed-off-by: Tomasz Andrzejak <andreiltd@gmail.com>

Author: andreiltd

src/hyperlight_guest_bin/build.rs

@@ -212,7 +212,6 @@ fn cc_build(picolibc_dir: &PathBuf, target: &str) -> Result<cc::Build> {
         .flag("-Werror=double-promotion")
         .flag("-Werror=implicit-function-declaration")
         .flag("-Werror=unreachable-code-fallthrough")
-        .flag("-Wmissing-prototypes")
         .flag("-Wmissing-declarations")
         .flag("-Wold-style-definition")
         .flag("-Wno-implicit-int")

src/hyperlight_guest_bin/src/host_bridge.rs

@@ -47,14 +47,14 @@ static CURRENT_TIME: AtomicU64 = AtomicU64::new(0);
 
 /// Matches picolibc `struct timespec` layout for x86_64.
 #[repr(C)]
-struct Timespec {
+pub(crate) struct Timespec {
     tv_sec: c_long,
     tv_nsec: c_long,
 }
 
 /// Matches picolibc `struct timeval` layout for x86_64.
 #[repr(C)]
-struct Timeval {
+pub(crate) struct Timeval {
     tv_sec: c_long,
     tv_usec: c_long,
 }