Use macros for gcc attributes

* defs.h (error_msg, perror_msg, error_msg_and_die, perror_msg_and_die,
die_out_of_memory, printllval, printnum_int, printnum_long, tprintf):
Use ATTRIBUTE_* macros for gcc attributes.
* file.c (struct stat64): Likewise.
* statfs.c (struct compat_statfs64): Likewise.
* strace.c (die, exec_or_die, init): Likewise.
* linux/sparc/arch_sigreturn.c: Likewise.
* linux/ubi-user.h: Likewise.
6 files changed