LGTM configuration for c++ added

.lgtm.yml

@@ -0,0 +1,27 @@
+extraction:
+  cpp:
+    prepare:
+      packages:
+      - "git"
+      - "cmake"
+      - "build-essential"
+      - "qtbase5-dev"
+      - "libqt5serialport5-dev"
+      - "libqt5sql5-sqlite"
+      - "libqt5svg5-dev"
+      - "libqt5x11extras5-dev"
+      - "libusb-1.0-0-dev"
+      - "python3-dev"
+      - "libcec-dev"
+      - "libxcb-image0-dev"
+      - "libxcb-util0-dev"
+      - "libxcb-shm0-dev"
+      - "libxcb-render0-dev"
+      - "libxcb-randr0-dev"
+      - "libxrandr-dev"
+      - "libxrender-dev"
+      - "libavahi-core-dev"
+      - "libavahi-compat-libdnssd-dev"
+      - "libturbojpeg0-dev"
+      - "libssl-dev"
+      - "zlib1g-dev"