* symtab.cc (Symbol::versioned_name): New function.
(Symbol_table::add_to_final_symtab): Use versioned_name when
appropriate.
(Symbol_table::sized_write_symbol): Likewise.
* symtab.h (class Symbol): Declare versioned_name.
* stringpool.h (class Stringpool_template): Add variant of add
which takes a std::basic_string.
* testsuite/Makefile.am (check_PROGRAMS): Add ver_test_12.
(ver_test_12_SOURCES, ver_test_12_DEPENDENCIES): New variables.
(ver_test_12_LDFLAGS, ver_test_12_LDADD): New variables.
(ver_test_12.o): New target.
* testsuite/Makefile.in: Rebuild.