[PATCH v2 2/2] [gdb/symtab] Use expand_all_symtabs in maint expand-symtabs

[Tom Tromey]

>>>>> "Tom" == Tom de Vries <tdevries@suse.de> writes:

Tom> To expand all symtabs gdb usually uses expand_all_symtabs (used for -readnow),
Tom> but here we try to handle it in the filename_matcher argument.

Tom> Make this more similar to how gdb usually works by using expand_all_symtabs.

Tom> A previous version of the patch instead used a nullptr filename_matcher for
Tom> the regexp == nullptr case.  That approach regressed test-cases
Tom> gdb.dwarf2/dwz-unused-pu.exp and gdb.dwarf2/dw2-dummy.exp.

Thanks.
Approved-By: Tom Tromey <tom@tromey.com>

Tom