message: Adding pkg-config in the apt install list
diff: @@ -26,7 +26,7 @@ Additionally, you'll need a C/C++ compiler and the basic dependencies needed for
  To check all dependencies and install missing ones on **Debian or Ubuntu**:
  - $ apt install build-essential libssl1.0-dev libevent-dev libseccomp-dev libcap-dev libboost-all-dev
  + $ apt install build-essential libssl1.0-dev libevent-dev libseccomp-dev libcap-dev libboost-all-dev pkg-config
  $ apt install libqt4-dev libqtwebkit-dev # only if building the GUI wallet
  To check all dependencies and install missing ones on **Arch Linux**:
  