merge from gcc

include/ChangeLog

include/demangle.h

include/libiberty.h

libiberty/ChangeLog

libiberty/_doprnt.c

libiberty/alloca.c

libiberty/argv.c

libiberty/asprintf.c

libiberty/atexit.c

libiberty/basename.c

libiberty/bcmp.c

libiberty/bcopy.c

libiberty/bsearch.c

libiberty/bzero.c

libiberty/calloc.c

libiberty/choose-temp.c

libiberty/clock.c

libiberty/concat.c

libiberty/copysign.c

libiberty/cp-demangle.c