builddeb: actually run make when building the deb (issue4778)

As of this change, we no longer produce broken debs, but I've already
got followups written that will produce much more standard-looking
packages and test the resulting packages.

contrib/builddeb

@@ -1,62 +1,63 b''
 #!/bin/sh -e
 #
 # Build a Mercurial debian package from the current repo
 #
 # Tested on Jessie (stable as of original script authoring.)
 
 . $(dirname $0)/packagelib.sh
 
 BUILD=1
 DEBBUILDDIR="$PWD/debbuild"
 while [ "$1" ]; do
     case "$1" in
     --prepare )
         shift
         BUILD=
         ;;
     --debbuilddir )
         shift
         DEBBUILDDIR="$1"
         shift
         ;;
     * )
         echo "Invalid parameter $1!" 1>&2
         exit 1
         ;;
     esac
 done
 
 set -u
 
 rm -rf $DEBBUILDDIR
 mkdir -p $DEBBUILDDIR
 
 if [ ! -d .hg ]; then
     echo 'You are not inside a Mercurial repository!' 1>&2
     exit 1
 fi
 
 gethgversion
 
 cp -r $PWD/contrib/debian $DEBBUILDDIR/DEBIAN
 chmod -R 0755 $DEBBUILDDIR/DEBIAN
 
 control=$DEBBUILDDIR/DEBIAN/control
 
 # This looks like sed -i, but sed -i behaves just differently enough
 # between BSD and GNU sed that I gave up and did the dumb thing.
 sed "s/__VERSION__/$version/" < $control > $control.tmp
 mv $control.tmp $control
 
 if [ "$BUILD" ]; then
+    make PREFIX=$DEBBUILDDIR/usr install
     dpkg-deb --build $DEBBUILDDIR
     mv $DEBBUILDDIR.deb $DEBBUILDDIR/mercurial-$version-$release.deb
     if [ $? = 0 ]; then
         echo
         echo "Built packages for $version-$release:"
         find $DEBBUILDDIR/ -type f -newer $control
     fi
 else
     echo "Prepared sources for $version-$release $control are in $DEBBUILDDIR - use like:"
     echo "dpkg-deb --build $DEBBUILDDIR"
 fi