* read.c (potable): Add string8, string16, string32 and string64. Add bit size for...

* read.c (potable): Add string8, string16, string32 and string64. Add bit size for stringer function.
 (stringer_append_char): New.
 (stringer): Use stringer_append_char().
* config/obj-coff.c (obj_coff_ident): Add bit size for stringer function.
* config/obj-elf.c (obj_elf_ident): Likewise.
* config/tc-alpha.c (s_alpha_stringer): Likewise.
* config/tc-dlx.c (dlx_pseudo_table): Likewise.
* config/tc-hppa.c (pa_stringer): Likewise.
* config/tc-ia64.c (md_pseudo_table, pseudo_opcode): Likewise.
* config/tc-m68hc11.c (md_pseudo_table): Likewise.
* config/tc-mcore.c (md_pseudo_table): Likewise.
* config/tc-mips.c (mips_pseudo_table): Likewise.
* config/tc-spu.c (md_pseudo_table): Likewise.
* config/tc-s390.c (md_pseudo_table): Likewise. Replace '2' by '1'.
* doc/as.texinfo (ABORT): Fix identing.
  (String): Document new string8, string16, string32, string64 functions.
* NEWS: Mention the new feature.

* testsuite/gas/all/gas.exp: Include new test "strings".
* testsuite/gas/all/string.s: New
* testsuite/gas/all/string.d: New.