Fix mimalloc build failure with musl and release mode

When building with mimalloc as the allocator targeting musl in release mode,
the compiler fails due to -Werror=date-time warnings caused by mimalloc's use
of __DATE__ and __TIME__ macros. This conflicts with musl's reproducible builds
requirements.

This commit adds the -Wno-error=date-time flag to the build configuration
to downgrade these specific warnings from errors to warnings. This allows
successful compilation while maintaining the functionality of mimalloc.

The change affects only musl targets in release mode and does not alter
behavior for other targets or build profiles.

Fixes compilation error: expansion of date/time macro in mimalloc with
musl + release combination.

Author: reigadegr

libmimalloc-sys/build.rs

@@ -6,6 +6,7 @@ fn main() {
     build.include("c_src/mimalloc/include");
     build.include("c_src/mimalloc/src");
     build.file("c_src/mimalloc/src/static.c");
+    build.flag("-Wno-error=date-time");
 
     let target_os = env::var("CARGO_CFG_TARGET_OS").expect("target_os not defined!");
     let target_family = env::var("CARGO_CFG_TARGET_FAMILY").expect("target_family not defined!");