merge from gcc

include/ChangeLog

include/ansidecl.h

include/libiberty.h

libiberty/ChangeLog

libiberty/alloca.c

libiberty/choose-temp.c

libiberty/concat.c

libiberty/config.in

libiberty/configure

libiberty/configure.ac

libiberty/cp-demangle.c

libiberty/cp-demint.c

libiberty/cplus-dem.c

libiberty/dyn-string.c

libiberty/fnmatch.c

libiberty/getopt.c

libiberty/getpwd.c

libiberty/hashtab.c

libiberty/lrealpath.c

libiberty/make-relative-prefix.c