Update to 3.3.0-36-g824cd5d40

• Fix status sed/regex error on 11/head.
• Fix some bogus 'pwait: No such process' warnings.
• image -t firmware: Fix installation of /usr/local/etc files (#637).
• image -f: Fix @flavor support.
• image: Fix errors calculating IMAGESIZE when not needed (like -t tar).
• image: Fix cleaning up temporary files properly when USE_TMPFS=all is used.