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

[H.J. Lu]

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.

OK for master?

Thanks.

-- 
H.J.
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