[ELF] Move demoteSymbols to Writer.cpp. NFC #1

	# LLVM Documentation CI
	# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
	# See https://llvm.org/LICENSE.txt for license information.
	# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

	name: "Test documentation build"

	permissions:
	contents: read

	on:
	push:
	branches:
	- 'main'
	paths:
	- 'llvm/docs/**'
	pull_request:
	paths:
	- 'llvm/docs/**'

	jobs:
	check-docs-build:
	name: "Test documentation build"
	runs-on: ubuntu-latest
	steps:
	- name: Fetch LLVM sources
	uses: actions/checkout@v4
	with:
	fetch-depth: 1
	- name: Setup Python env
	uses: actions/setup-python@v4
	with:
	python-version: '3.11'
	cache: 'pip'
	cache-dependency-path: 'llvm/docs/requirements.txt'
	- name: Install python dependencies
	run: pip install -r llvm/docs/requirements.txt
	- name: Install system dependencies
	run: \|
	sudo apt-get update
	sudo apt-get install -y cmake ninja-build
	- name: Build docs
	run: \|
	mkdir build
	cd build
	cmake -GNinja -DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_SPHINX=ON -DSPHINX_OUTPUT_HTML=ON -DSPHINX_OUTPUT_MAN=ON ../llvm
	TZ=UTC ninja docs-llvm-html docs-llvm-man

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