lte: Export UE_MEASUREMENT_REPORT_DELAY symbol for MSVC compatibility

src/lte/CMakeLists.txt

@@ -358,4 +358,5 @@ build_lib(
     ${libconfig-store}
   TEST_SOURCES ${test_sources}
   MODULE_ENABLED_FEATURES ${emu_features}
+  GENERATE_EXPORT_HEADER
 )

src/lte/model/lte-ue-rrc.h

@@ -23,6 +23,7 @@
 #include "lte-ue-cphy-sap.h"
 
 #include "ns3/deprecated.h"
+#include "ns3/lte-export.h"
 #include "ns3/object.h"
 #include "ns3/packet.h"
 #include "ns3/traced-callback.h"
@@ -50,7 +51,7 @@ namespace ns3
  *  - time-to-trigger check is always performed before the reporting, so there
  *    would still be chance for it to cancel the reporting if necessary.
  */
-extern const Time UE_MEASUREMENT_REPORT_DELAY;
+LTE_EXPORT extern const Time UE_MEASUREMENT_REPORT_DELAY;
 
 class LteRlc;
 class LteMacSapProvider;