bash-completion: fix 'files already exist' WARNING message

Some bash completion commands are already provided by util-linux recipe.
Also disable parallel build because "symlinks" rule is buggy (see completions/Makefile.am).

Signed-off-by: Matthieu CRAPET <Matthieu.CRAPET@ingenico.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-oe/recipes-support/bash-completion/bash-completion_2.0.bb

@@ -5,6 +5,8 @@ BUGTRACKER = "https://alioth.debian.org/projects/bash-completion/"
 LICENSE = "GPLv2"
 LIC_FILES_CHKSUM = "file://COPYING;md5=751419260aa954499f7abaabaa882bbe"
 
+PR = "r1"
+
 SECTION = "console/utils"
 
 SRC_URI="http://bash-completion.alioth.debian.org/files/${BPN}-${PV}.tar.bz2"
@@ -12,11 +14,19 @@ SRC_URI="http://bash-completion.alioth.debian.org/files/${BPN}-${PV}.tar.bz2"
 SRC_URI[md5sum] = "0d903f398be8c8f24bc5ffa6f86127f8"
 SRC_URI[sha256sum] = "e5a490a4301dfb228361bdca2ffca597958e47dd6056005ef9393a5852af5804"
 
+PARALLEL_MAKE = ""
+
 inherit allarch autotools
 
 do_install_append() {
 	install -d ${D}${sysconfdir}/bash_completion.d/
 	echo '. ${datadir}/${BPN}/bash_completion' >${D}${sysconfdir}/bash_completion
+
+	# Delete files already provided by util-linux
+	local i
+	for i in cal dmesg hwclock ionice look renice rtcwake; do
+		rm ${D}${datadir}/${BPN}/completions/$i
+	done
 }
 
 RDEPENDS_${PN} = "bash"