d/control: Increase Priority of libcap2{,-bin} to important

Closes: #815566

debian/control

@@ -15,6 +15,7 @@ Vcs-Browser: https://anonscm.debian.org/cgit/collab-maint/libcap2.git
 
 Package: libcap2-bin
 Section: utils
+Priority: important
 Architecture: linux-any
 Multi-Arch: foreign
 Depends:
@@ -31,7 +32,7 @@ Description: POSIX 1003.1e capabilities (utilities)
  This package contains additional utilities.
 
 Package: libcap2
-Priority: standard
+Priority: important
 Architecture: linux-any
 Multi-Arch: same
 Pre-Depends: ${misc:Pre-Depends}