ld: Remove elf_i386_ldso reference

There's still a reference to the removed elf_i386_ldso emulation, breaking
the build with --enable-targets=all.

Tested on x86_64-pc-linux-gnu.

2025-12-11  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	ld:
	* Makefile.am (ALL_EMULATION_SOURCES): Remove eelf_i386_ldso.c.
	* Makefile.in: Regenerate.