Commit bc554b4 compiles qt-5 with the system harfbuzz and removes a bundled copy from our source code (the one called harfbuzz-ng; strangely, there is another one, called harfbuzz, without which the package does not compile).
Commit 9c32e1f removes the bundled sqlite copy (the system sqlite was already used before). Some other system libraries are already used automatically; to make things clearer, we could also remove their source code (from the corresponding 3rdparty/ subdirectories). Andreas
