Add pkg-config to build-dependencies

debian/control

@@ -2,7 +2,7 @@ Source: mosh
 Section: net
 Priority: optional
 Maintainer: Keith Winstein <keithw@mit.edu>
-Build-Depends: debhelper (>= 8.0.0), autotools-dev, protobuf-compiler, libprotobuf-dev, dh-autoreconf
+Build-Depends: debhelper (>= 8.0.0), autotools-dev, protobuf-compiler, libprotobuf-dev, dh-autoreconf, pkg-config
 Standards-Version: 3.9.2
 Homepage: http://mosh.mit.edu
 Vcs-Git: git://github.com/keithw/mosh.git
@@ -11,7 +11,7 @@ Vcs-Browser: http://github.com/keithw/mosh
 Package: mosh
 Architecture: any
 Depends: ${shlibs:Depends}, ${misc:Depends}, libprotobuf-lite7
-Description: Remote terminal with local echo and IP roaming
+Description: Mobile shell that supports roaming and intelligent local echo
  Mosh is a remote terminal application that supports:
    - intermittent network connectivity,
    - roaming to different IP address without dropping the connection, and