elf: Clear entsize when clearing SEC_MERGE|SEC_STRINGS When generating an output from input SEC_MERGE|SEC_STRINGS sections with different entsizes, we clear the SEC_MERGE|SEC_STRINGS bits. We also need to clear entsize. PR ld/33291 * ldlang.c (lang_add_section): Clearing entsize when clearing SEC_MERGE|SEC_STRINGS. * testsuite/ld-elf/pr33291.d: New file. * testsuite/ld-elf/pr33291a.s: Likewise. * testsuite/ld-elf/pr33291b.s: Likewise. Signed-off-by: H.J. Lu <hjl.tools@gmail.com>