x86: Rename -harden-sls=indirect-branch to -harden-sls=indirect-jmp

x86: Rename -harden-sls=indirect-branch to -harden-sls=indirect-jmp

Indirect branch also includes indirect call instructions.  Rename
-harden-sls=indirect-branch to -harden-sls=indirect-jmp to match its
intended behavior.

	PR target/102952
	* config/i386/i386-opts.h (harden_sls): Replace
	harden_sls_indirect_branch with harden_sls_indirect_jmp.
	* config/i386/i386.c (ix86_output_jmp_thunk_or_indirect):
	Likewise.
	(ix86_output_indirect_jmp): Likewise.
	(ix86_output_call_insn): Likewise.
	* config/i386/i386.opt: Replace indirect-branch with
	indirect-jmp.  Replace harden_sls_indirect_branch with
	harden_sls_indirect_jmp.
	* doc/invoke.texi (-harden-sls=): Replace indirect-branch with
	indirect-jmp.