Put a cleanup stamp for later use

.cleanup.sh

@@ -32,4 +32,8 @@ rm -rf ${PAWPAW_BUILDDIR}/*/.deps
 rm -rf ${PAWPAW_BUILDDIR}/*/.libs
 rm -rf ${PAWPAW_BUILDDIR}/*/.lock-waf_linux_build
 
+for dir in $(find ${PAWPAW_BUILDDIR} -type d -depth 1); do
+    touch ${dir}/.stamp_cleanup
+done
+
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