boinc-nox: Add the 'boinc' user to boinc-nox

boinc is created for the boinc package, but not for boinc-nox which
breaks it.

srcpkgs/boinc/template

@@ -1,7 +1,7 @@
 # Template file for 'boinc'
 pkgname=boinc
 version=7.16.20
-revision=1
+revision=2
 _majorver=${version%.*}
 wrksrc=boinc-client_release-${_majorver}-${version}
 build_style=gnu-configure
@@ -129,6 +129,9 @@ boinc-devel_package() {
 boinc-nox_package() {
 	short_desc+=" - no X"
 	conflicts="boinc>=0"
+	system_accounts="boinc"
+	boinc_homedir="/var/lib/boinc"
+	boinc_shell="/bin/bash"
 	pkg_install() {
 		cd ${wrksrc}/nox
 		make ${makejobs} DESTDIR=${PKGDESTDIR} install