[ci] link boost statically

This allows the CI-built tracker to actually be loaded from the AppImage build without having the exact same boost version installed system-wide..

ci/configure.py

@@ -26,6 +26,8 @@ if __name__ == "__main__":
     command += define("CMAKE_SKIP_PACKAGE_ALL_DEPENDENCY", "ON")
     command += define_env("VCPKG_TARGET_TRIPLET")
 
+    command += define("Boost_USE_STATIC_LIBS", "ON")
+
     if system() == "Windows":
         command += define("PACKAGE_MSI", "ON")
     elif system() == "Linux":