contrib/makerepo.sh: adapt to "fedpkg prep" new behavior

Now "fedpkg prep" command is generating a directory with the "-build"
suffix containing the build directory inside. We need to extract it.

Real example:

If the script is used for a branch related to nm-1-46, the "fedpkg prep"
command will generate a NetworkManager-1.46-build/ directory containing
the NetworkManager-1.46/ sources directory. We just need to move the
NetworkManager-1.46/ out.

contrib/fedora/utils/makerepo.sh

@@ -262,6 +262,12 @@ detect_dirname() {
         # the unpacked tarball (that is, stripping the suffix).
         for T in $(ls -1 "$BUILD_TYPE"*"$suffix" 2>/dev/null); do
             D="${T%$suffix}"
+            # At some point FEDPKG changed the behavior of "prep" command
+            # now it generates the directory with "-build" suffix and the
+            # real directory inside. We just move it out.
+            rm -rf $D
+            mv $D-build/$D .
+            rm -rf $D-build
             [[ -d "$D" ]] && DIRS=("${DIRS[@]}" "$D")
         done
     done