component/util-linux: build with libcap-ng

Explicitly build with libcap-ng instead of depending on presence of the
development library on the host.

Also fix the way of disabling tinfo, there was warning at the end of
configure saying this option is not used

component/util-linux/buildout.cfg

 [buildout]
 extends =
   ../perl/buildout.cfg
+  ../libcap-ng/buildout.cfg
   ../xz-utils/buildout.cfg
 
 [util-linux]
 recipe = slapos.recipe.cmmi
+shared = true
 url = https://www.kernel.org/pub/linux/utils/util-linux/v2.31/util-linux-2.31.1.tar.xz
 md5sum = 7733b583dcb51518944d42aa62ef19ea
 configure-options =
@@ -31,7 +33,7 @@ configure-options =
   --disable-setterm
   --enable-libsmartcols
   --disable-switch_root
-  --disable-tinfo
+  --without-tinfo
   --disable-tls
   --disable-ul
   --disable-unshare
@@ -43,5 +45,7 @@ configure-options =
   --without-slang
   --without-selinux
   --without-audit
+  --with-cap-ng=${libcap-ng:location}
 environment =
   PATH=${perl:location}/bin:${xz-utils:location}/bin:%(PATH)s
+  LDFLAGS=-L${libcap-ng:location}/lib -Wl,-rpath=${libcap-ng:location}/lib