Copy volk.dll when building on Windows

CMakeLists.txt

@@ -22,6 +22,7 @@ target_link_libraries(sdrpp PRIVATE sdrpp_core)
 # Copy dynamic libs over
 if (MSVC)
     add_custom_target(do_always ALL xcopy /s \"$<TARGET_FILE_DIR:sdrpp_core>\\*.dll\" \"$<TARGET_FILE_DIR:sdrpp>\" /Y)
+    add_custom_target(do_always_volk ALL xcopy /s \"C:/Program Files/PothosSDR/bin\\volk.dll\" \"$<TARGET_FILE_DIR:sdrpp>\" /Y)
 endif (MSVC)
 
 if (${CMAKE_SYSTEM_NAME} MATCHES "Linux")