Merge bitcoin#480: [Build] compile/link winshutdownmonitor.cpp on Windows only

6781087 [Build] compile/link winshutdownmonitor.cpp on Windows only (Fuzzbawls)

Tree-SHA512: 66c60182cbd1507b37c6f985a5513a6fdaaaa19706b2282308412f35191ca18b4f24fa94dd2216adfb2b40d37539f076a6c1bec98d75246181f8ae381cda9fc3

Author: Mrs-X

src/Makefile.qt.include

@@ -274,8 +274,11 @@ BITCOIN_QT_CPP = \
   qt/rpcconsole.cpp \
   qt/splashscreen.cpp \
   qt/trafficgraphwidget.cpp \
-  qt/utilitydialog.cpp \
-  qt/winshutdownmonitor.cpp
+  qt/utilitydialog.cpp
+
+if TARGET_WINDOWS
+BITCOIN_QT_CPP += qt/winshutdownmonitor.cpp
+endif
 
 if ENABLE_WALLET
 BITCOIN_QT_CPP += \