Move psymtab statistics printing to psymtab.c

Move psymtab statistics printing to psymtab.c

This moves all the psymtab statistics printing code form symmisc.c to
psymtab.c.  This changes the formatting of the output a little, but
considering that it is a maint command (and, I assume, a rarely used
one), this seems fine to me.

This change helps further dissociate the psymtab from the objfile.  In
the end there will be no direct connect -- only via the
quick_symbol_functions interface.

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

	* dwarf2/read.c (dwarf2_base_index_functions::print_stats): Add
	print_bcache parameter.
	* symfile-debug.c (objfile::print_stats): Add print_bcache
	parameter.
	* quick-symbol.h (struct quick_symbol_functions)
	<print_stats>: Add print_bcache parameter.
	* symmisc.c (print_symbol_bcache_statistics, count_psyms): Move
	code to psymtab.c.
	(print_objfile_statistics): Move psymtab code to psymtab.c.
	* psymtab.c (count_psyms): Move from symmisc.c.
	(psymbol_functions::print_stats): Print partial symbol and bcache
	statistics.  Add print_bcache parameter.
	* objfiles.h (print_symbol_bcache_statistics): Don't declare.
	(struct objfile) <print_stats>: Add print_bcache parameter.
	* maint.c (maintenance_print_statistics): Update.

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

	* gdb.base/maint.exp: Update "maint print statistics" output.