switch to libmimalloc.a because go linker is sometimes doing unpredictable things

src/SPC/builder/unix/library/mimalloc.php

@@ -14,6 +14,7 @@ trait mimalloc
         $cmake = UnixCMakeExecutor::create($this)
             ->addConfigureArgs(
                 '-DMI_BUILD_SHARED=OFF',
+                '-DMI_BUILD_OBJECT=OFF',
                 '-DMI_INSTALL_TOPLEVEL=ON',
             );
         if (SPCTarget::getLibc() === 'musl') {