also override library path for hotplug scripts

Overriding PATH but not LD_LIBRARY_PATH is bogus, as it may result in
the use of mismatched binaries and libraries.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

--- a/tools/hotplug/Linux/xen-hotplug-common.sh
+++ b/tools/hotplug/Linux/xen-hotplug-common.sh
@@ -31,6 +31,7 @@ dir=$(dirname "$0")
 exec 2>>/var/log/xen/xen-hotplug.log
 
 export PATH="${BINDIR}:${SBINDIR}:${LIBEXEC}:${PRIVATE_BINDIR}:/sbin:/bin:/usr/bin:/usr/sbin:$PATH"
+export LD_LIBRARY_PATH="${LIBDIR}${LD_LIBRARY_PATH+:}$LD_LIBRARY_PATH"
 export LANG="POSIX"
 unset $(set | grep ^LC_ | cut -d= -f1)