contrib/rpm: add --no-build option to build_clean.sh

Option to skip building the source package. Useful if you already
have a source tarball from a previous run.

contrib/fedora/rpm/build_clean.sh

@@ -31,6 +31,7 @@ cd "$GITDIR" || die "could not change to $GITDIR"
 IGNORE_DIRTY=0
 GIT_CLEAN=0
 QUICK=0
+NO_BUILD=0
 
 for A; do
     case "$A" in
@@ -50,6 +51,10 @@ for A; do
         -S|--srpm)
             BUILDTYPE=SRPM
             ;;
+        -N|--no-build)
+            NO_BUILD=1
+            IGNORE_DIRTY=1
+            ;;
         *)
             usage
             die "Unexpected argument \"$A\""
@@ -73,6 +78,7 @@ if [[ $IGNORE_DIRTY != 1 ]]; then
     fi
 fi
 
+if [[ $NO_BUILD != 1 ]]; then
     ./autogen.sh --enable-gtk-doc || die "Error autogen.sh"
 
     if [[ $QUICK == 1 ]]; then
@@ -87,6 +93,7 @@ else
         make -j 10 || die "Error make"
         make distcheck || die "Error make distcheck"
     fi
+fi
 
 export BUILDTYPE