RISC-V: New emulations to make path searches follow glibc ABI.

RISC-V: New emulations to make path searches follow glibc ABI.

	ld/
	PR ld/22962
	* Makefile.am (ALL_EMULATION_SOURCES): Add eelf32lriscv_ilp32f.c,
	eelf32lriscv_ilp32.c, eelf64lriscv_lp64f.c, eelf64lriscv_lp64.c.
	(eelf32lriscv_ilp32f.c, eelf32lriscv_ilp32.c): New build rules.
	(eelf64lriscv_lp64f.c, eelf64lriscv_lp64.c): New build rules.
	* Makefile.in: Regenerated.
	* configure.tgt (riscv32*-*-linux*, riscv64*-*-linux*): New.
	* ld/emulparams/elf32lriscv.sh: Set LIBPATH_SUFFIX.
	* ld/emulparams/elf32lriscv_ilp32.sh: New.
	* ld/emulparams/elf32lriscv_ilp32f.sh: New.
	* ld/emulparams/elf64lriscv-defs.sh: Don't set LIBPATH_SUFFIX here.
	* ld/emulparams/elf64lriscv.sh: Set LIBPATH_SUFFIX.
	* ld/emulparams/elf64lriscv_lp64.sh: New.
	* ld/emulparams/elf64lriscv_lp64f.sh: New.
	* ld/genscripts.sh (append_to_lib_path): Change LIBPATH_SUFFIX test to
	a for.  Inside loop, change LIBPATH_SUFFIX uses to libpath_suffix.
	(LIB_PATH): In LIB_PATH if, add loop for LIBPATH_SUFFIX, changes uses
	inside loop to libpath_suffix.