pulseaudio: remove INSTALL and move INSTALL.msg.

INSTALL script installed a /usr/lib32 symlink to /usr/lib on x86
machines (added in 5bb3a0cf7b), which has
been unnecessary for a long time, given that base-files contains the
symlink already. It was also the wrong solution: libdir being special
cased to /usr/lib32 on i686 (to provide the multilib repo) should have
led to the symlink being part of some base package, not a workaround in
a specific package.

Furthermore, ever since 488edb2a9c, the
package follows Void's policy of always using /usr/lib$wordsize as
libdir, instead of /usr/lib, and most things dealing with library paths
shouldn't be package specific.

---

Since we are here:

INSTALL.msg doesn't need to be printed every time the package is
updated, so move to README.voidlinux.

Don't use -f in rm commands.

srcpkgs/pulseaudio/INSTALL

@@ -1,7 +0,0 @@
-case "${ACTION}" in
-post)
-	if [ "$ARCH" = "i686" ]; then
-		ln -sf lib usr/lib32
-	fi
-	;;
-esac

srcpkgs/pulseaudio/template

@@ -1,7 +1,7 @@
 # Template file for 'pulseaudio'
 pkgname=pulseaudio
 version=14.2
-revision=2
+revision=3
 build_style=meson
 # XXX: new version should be able to enable systemd functionality using elogind
 configure_args="-Djack=enabled -Dlirc=disabled -Dhal-compat=false -Dorc=enabled
@@ -47,8 +47,9 @@ pre_configure() {
 }
 
 post_install() {
-	rm -f ${DESTDIR}/etc/dbus-1/system.d/pulseaudio-system.conf
+	rm ${DESTDIR}/etc/dbus-1/system.d/pulseaudio-system.conf
 	vsv pulseaudio
+	vdoc $FILESDIR/README.voidlinux
 }
 
 libpulseaudio_package() {