Fix breakage to make the Traprain package built unchanged
Address some missing deps, some python3 issues, some incompatible changes from upstream to make at least the appfw/traprain> package build successfully (documentation may still have issues, but that's for another time).
- 85010a1f Unbreak the hotdoc-c-extension adding missing deps to LLVM/Clang
- ca03627f d/p/xdg-fix.patch: Fix use-before-import error
- 03bf5acc Make the autoconf macro backward compatible
- 8d7d4d79 Revert compatibility-breaking upstream change to index path resolution
- aee17dd3 Fix a python3/networkx issue subscripting an iterator
-
dcf0885f Fix duplicated
books
dir when installing DevHelp contents - df40fdd7 Release hotdoc version 0.10.0-0co5