Removed problematic cmake script and improved qmake script.

There was some issues in cmake build. For some reason it doesn't
handle QObjects properly and are so causing issues with telemetry
signals.

Modified qmake script to use user compiled MAVSDK installed to
/usr/local/

Type: Improvement

src/autopilot.pro

@@ -1,11 +1,13 @@
 QT = core
 CONFIG += c++17 cmdline
 
+# Reduce compiler warnings from the ArduPilot headers
 QMAKE_CXXFLAGS += -Wno-address-of-packed-member
 
 # MAVSDK pkg-config file is garbage. Add dependency manually
-INCLUDEPATH += /usr/include/mavsdk
-LIBS += /usr/lib/libmavsdk.so.2
+QMAKE_RPATHDIR += /usr/local/lib
+INCLUDEPATH += /usr/local/include/mavsdk
+LIBS += /usr/local/lib/libmavsdk.so
 
 SOURCES += \
         az_action_point.cpp \