Windows build: added Airspy plugin

plugins/samplesource/airspy/airspy.pro

@@ -0,0 +1,39 @@
+#--------------------------------------------------------
+#
+# Pro file for Android and Windows builds with Qt Creator
+#
+#--------------------------------------------------------
+
+TEMPLATE = lib
+CONFIG += plugin
+
+QT += core gui widgets multimedia
+
+TARGET = inputairspy
+
+CONFIG(MINGW32):LIBAIRSPYSRC = "D:\softs\libairspy"
+INCLUDEPATH += $$PWD
+INCLUDEPATH += ../../../sdrbase
+INCLUDEPATH += $$LIBAIRSPYSRC
+
+CONFIG(Release):build_subdir = release
+CONFIG(Debug):build_subdir = debug
+
+SOURCES += airspygui.cpp\
+  airspyinput.cpp\
+  airspyplugin.cpp\
+  airspysettings.cpp\
+  airspythread.cpp
+
+HEADERS += airspygui.h\
+  airspyinput.h\
+  airspyplugin.h\
+  airspysettings.h\
+  airspythread.h
+
+FORMS += airspygui.ui
+
+LIBS += -L../../../sdrbase/$${build_subdir} -lsdrbase
+LIBS += -L../../../libairspy/$${build_subdir} -llibairspy
+
+RESOURCES = ../../../sdrbase/resources/res.qrc