* gdbtypes.h: Declare f77_create_literal_string_type and
f77_create_literal_complex_type.
* valops.c (f77_value_literal_string, f77_value_substring,
f77_value_literal_complex): Use xmalloc not malloc.
* valops.c (f77_value_literal_string, f77_value_substring):
Make addr char * not CORE_ADDR.
* value.h (struct value): Add new field literal_data of aligner union.
(VALUE_LITERAL_DATA): Use it.
* f-lang.h: Declare find_common_for_function.
* value.h, valops.c: Split VALUE_SUBSTRING_START into memaddr and
myaddr fields of a union. Don't overload it with the frame field
(not sure this is necessary; I'm not sure what lval_* codes
VALUE_SUBSTRING_* can be used with).