Bug 565191 - Add build option "--with-debug-label". r=ted

configure.in

@@ -6959,6 +6959,14 @@ MOZ_ARG_ENABLE_STRING(debug,
   MOZ_DEBUG=)
 
 MOZ_DEBUG_ENABLE_DEFS="-DDEBUG -D_DEBUG"
+MOZ_ARG_WITH_STRING(debug-label,
+[  --with-debug-label=LABELS
+                           Define DEBUG_<value> for each comma-separated
+                           value given.],
+[ for option in `echo $withval | sed 's/,/ /g'`; do
+    MOZ_DEBUG_ENABLE_DEFS="$MOZ_DEBUG_ENABLE_DEFS -DDEBUG_${option}"
+done])
+
  case "${target_os}" in
     beos*)
         MOZ_DEBUG_ENABLE_DEFS="$MOZ_DEBUG_ENABLE_DEFS -DDEBUG_${USER}"