[binutils-gdb] x86: Check valid PLT sections before checking dynamic relocations

[sergiodj+buildbot@sergiodj.net]

*** TEST RESULTS FOR COMMIT 37c0b6ee65941d54fa8064c21b39f97fdc318156 ***

Author: H.J. Lu <hjl.tools@gmail.com>
Branch: master
Commit: 37c0b6ee65941d54fa8064c21b39f97fdc318156

x86: Check valid PLT sections before checking dynamic relocations

Update x86 get_synthetic_symtab to check valid PLT sections before
checking dynamic relocations and free invalid PLT section contents.

	* elf32-i386.c (elf_i386_get_synthetic_symtab): Check valid PLT
	sections before checking dynamic relocations and free invalid
	PLT section contents.
	* elf64-x86-64.c (elf_x86_64_get_synthetic_symtab): Likewise.