binutils: Don't complain plugin with all LTO sections removed

binutils: Don't complain plugin with all LTO sections removed

When all LTO sections have been removed, the BFD lto_type is set to
lto_non_ir_object by bfd_set_lto_type.  In this case, don't complain
needing a plugin when seeing a LTO slim symbol.

bfd/

	PR binutils/32967
	* archive.c (_bfd_compute_and_write_armap): Call
	bfd_lto_slim_symbol_p to check LTO slim symbol.
	* bfd-in2.h: Generated.
	* bfd.c (bfd_lto_slim_symbol_p): New.

binutils/

	PR binutils/32967
	* nm.c (filter_symbols): Call bfd_lto_slim_symbol_p to check
	LTO slim symbol.

ld/

	PR binutils/32967
	* testsuite/ld-plugin/lto-binutils.exp: Run PR binutils/32967
	tests.
	* testsuite/ld-plugin/strip-1a-s-all.nd: New file.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>