[Buildroot] [git commit branch/2020.11.x] package/util-linux: disable runuser for the host build

commit: https://git.buildroot.net/buildroot/commit/?id=3fade8ff9b122d72b97fd01bd75a44956d4a161a
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/2020.11.x

runuser allows running commands as another user, but needs to run as
root to be able to setuid(). But Buildroot does not require running as
root, and so runuser can't be used.

Incientally, that fixes host build in case unsuitable libs are found on
the system:
    http://lists.busybox.net/pipermail/buildroot/2021-February/304261.html

Reported-by: GA K <redacted>
Signed-off-by: Peter Seiderer <redacted>
[yann.morin.1998 at free.fr:
  - expand the commit log with a more fundamental explanation that
    runuser can't be used anyway
]
Signed-off-by: Yann E. MORIN <redacted>
(cherry picked from commit 955d6c099b2035dcca47554a735a4c700b5d3e1e)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
---
 package/util-linux/util-linux.mk | 1 +
 1 file changed, 1 insertion(+)

diff --git a/package/util-linux/util-linux.mk b/package/util-linux/util-linux.mk
index b726f89505..82a5751a53 100644
--- a/package/util-linux/util-linux.mk
+++ b/package/util-linux/util-linux.mk

@@ -210,6 +210,7 @@ HOST_UTIL_LINUX_CONF_OPTS += \
 	--disable-nsenter \
 	--disable-pg \
 	--disable-rfkill \
+	--disable-runuser \
 	--disable-schedutils \
 	--disable-setpriv \
 	--disable-setterm \