build-system: add LGTM yaml file

This should allow LGTM.com to build the C/C++ code.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

.lgtm.yml

@@ -0,0 +1,44 @@
+path_classifiers:
+    test:
+      - "tests/*"
+
+extraction:
+    cpp:
+        prepare:
+            packages: 
+            - libxml2-dev
+            - libxslt1-dev
+            - libzip-dev
+            - libsqlite3-dev
+            - libusb-1.0-0-dev
+            - libssl-dev
+            - libssh2-1-dev
+            - libcurl4-gnutls-dev
+            - libkrb5-dev
+            - libhttp-parser-dev
+            - libgit2-dev
+            - libcrypto++-dev
+            - libqt5qml5
+            - libqt5quick5
+            - libqt5svg5-dev
+            - libqt5webkit5-dev
+            - libsqlite3-dev
+            - qml-module-qtlocation
+            - qml-module-qtpositioning
+            - qml-module-qtquick2
+            - qt5-default
+            - qt5-qmake
+            - qtchooser
+            - qtconnectivity5-dev
+            - qtdeclarative5-dev
+            - qtdeclarative5-private-dev
+            - qtlocation5-dev
+            - qtpositioning5-dev
+            - qtscript5-dev
+            - qttools5-dev
+            - qttools5-dev-tools
+            - qtquickcontrols2-5-dev
+        after_prepare:
+            - export INSTALL_ROOT=/opt/out
+            - export PKG_CONFIG_PATH=$INSTALL_ROOT/lib/pkgconfig:$PKG_CONFIG_PATH
+            - bash -x ./scripts/build-libdivecomputer.sh