debian: force build output to stderr

Because we're capturing the string return value of these functions, we
can't see any output that goes to stdout.

debian/util.sh

@@ -133,6 +133,7 @@ check_repo_clean () {
 }
 
 create_orig () {
+  {
     local OPTIND OPTARG
     local uver="" bundle_deps=false zl=9e
     while getopts 'bnv:z:' o "$@"; do
@@ -172,10 +173,12 @@ create_orig () {
       | xz -c -${zl}v > $orig
     mv .gitattributes.orig .gitattributes
     git reset --hard HEAD^ && git clean -fdx
+  } 1>&2
   echo $orig
 }
 
 create_dsc () {
+  {
     local distro="$(find_distro $1)" orig="$2"
     local suite="$(find_suite $distro)"
     local orig_ver="$(echo "$orig" | sed -e 's/^.*_//' -e 's/\.orig\.tar.*$//')"
@@ -189,6 +192,7 @@ create_dsc () {
     dpkg-genchanges -S > ../$(dsc_base)_source.changes
     local dsc="../$(dsc_base).dsc"
     git reset --hard HEAD^ && git clean -fdx
+  } 1>&2
   echo $dsc
 }
 
@@ -202,6 +206,7 @@ EOF
 }
 
 build_debs () {
+  {
     local OPTIND OPTARG debug_hook=false hookdir=""
     while getopts 'd' o "$@"; do
       case "$o" in
@@ -241,6 +246,7 @@ build_debs () {
       hookdir=$(pwd)/.hooks
     fi
     cow --build $dsc --hookdir "$hookdir"
+  } 1>&2
   echo ${dsc}_${arch}.changes
 }