[PATCH] lto: Set resolution to LDPR_PREVAILING_DEF for non-IR common symbol

[H.J. Lu]

Since size or alignment of common symbol may be overridden by another
common symbol, set symbol resolution to LDPR_PREVAILING_DEF, instead of
LDPR_RESOLVED_EXEC, for common symbol in regular object when seeing an
undefined or common symbol from an IR object.

PR ld/34570
* plugin.c (get_symbols): Set resolution to LDPR_PREVAILING_DEF
for common symbol in regular object.
* testsuite/ld-plugin/pr34570a.c: New file.
* testsuite/ld-plugin/pr34570a.d: Likewise.
* testsuite/ld-plugin/pr34570b.c: Likewise.
* testsuite/ld-plugin/pr34570b.d: Likewise.
* testsuite/ld-plugin/pr34570c.c: Likewise.
* testsuite/ld-plugin/pr34570c.d: Likewise.

-- 
H.J.
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