cosmo: fix missing include for utime.h

cosmo/Dockerfile

@@ -33,6 +33,8 @@ RUN : \
  && shed Makefile '/COSMOPOLITAN_OBJECTS =/a\\tTOOL_ARGS\t\t\\' \
 # include nsync_cv_signal and nsync_cv_wait_with_deadline in cosmopolitan.a \
  && shed Makefile '/THIRD_PARTY_NSYNC_MALLOC/i\\tTHIRD_PARTY_NSYNC_MEM\t\t\\' \
+# add missing include \
+ && shed libc/isystem/utime.h '/"libc\/time\/time.h"/i\#include "libc/time/struct/utimbuf.h"' \
 # awk's pledge isn't working for me for whatever reason \
  && shed third_party/awk/main.c '/pledge.*{/,/}/d' \
 # create a mapping from flavor to mode (possibly an empty string) \