Add partial_symtabs parameter to psymtab construction functions

Add partial_symtabs parameter to psymtab construction functions

This adds a partial_symtabs parameter to the psymtab constructors and
to add_psymbol.  This helps with the overall project of removing the
partial symtabs from the objfile.

gdb/ChangeLog
2021-03-20  Tom Tromey  <tom@tromey.com>

	* xcoffread.c (xcoff_start_psymtab): Add partial_symtabs parameter.
	(xcoff_end_psymtab, scan_xcoff_symtab): Update.
	* psymtab.c (partial_symtab::partial_symtab): Add partial_symtabs
	parameter.
	(add_psymbol_to_bcache): Remove.
	(partial_symtab::add_psymbol): Add partial_symtabs parameter.
	(partial_symtab::add_psymbol, partial_symtab::partial_symtab):
	Likewise.
	* psympriv.h (partial_symtab): Add partial_symtabs parameter.
	<add_psymbol>: Likewise.
	(standard_psymtab, legacy_psymtab): Likewise.
	* mdebugread.c (parse_partial_symbols): Update.
	(handle_psymbol_enumerators): Add partial_symtabs parameter.
	(handle_psymbol_enumerators): Update.
	(new_psymtab): Add partial_symtabs parameter.
	* dwarf2/read.h (dwarf2_psymtab): Add partial_symtabs parameter.
	* dwarf2/read.c (dwarf2_include_psymtab): Add partial_symtabs
	parameter.
	(dwarf2_create_include_psymtab): Add partial_symtabs parameter.
	(create_partial_symtab, add_partial_symbol, dwarf_decode_lines):
	Update.
	* dbxread.c (read_dbx_symtab): Update.
	(start_psymtab): Add partial_symtabs parameter.
	(dbx_end_psymtab): Update.
	* ctfread.c (struct ctf_context) <partial_symtabs>: New member.
	(ctf_psymtab): Add partial_symtabs parameter.
	(create_partial_symtab, ctf_psymtab_type_cb, ctf_psymtab_var_cb):
	Update.
	(scan_partial_symbols): Add partial_symtabs parameter.
	(scan_partial_symbols, elfctf_build_psymtabs)
	(ctf_psymtab_add_enums): Update.