PR27271, c6x-uclinux-ld segfaults linking ld-uClibc-1.0.37.so

bfd/
	PR 27271
	* elflink.c (bfd_elf_link_record_dynamic_symbol): Don't segfault
	on symbols defined in absolute or other special sections.
ld/
	* testsuite/ld-tic6x/tic6x.exp: Add pr27271 test.

(cherry picked from commit c4566785)