[PATCH] ld: Check bfd_gc_sections return

[H.J. Lu]

bfd_gc_sections may return false on invalid input:

ld: pr34448-bug_18.o: bad reloc symbol index (0xf2000005 >= 0x13) for
offset 0x4 in section `.text.get_tls[get_tls]'

and set the BFD error to bfd_error_bad_value.  Check bfd_gc_sections
return and report the fatal error if the BFD error is bfd_error_bad_value.

PR ld/34448
* ldlang.c (lang_gc_sections): Check bfd_gc_sections return and
report the fatal error if the BFD error is bfd_error_bad_value.


-- 
H.J.
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