Set doc folder for Windows

Author: justing-bq

cpp/src/arrow/flight/sql/odbc/CMakeLists.txt

@@ -154,6 +154,7 @@ if(ARROW_FLIGHT_SQL_ODBC_INSTALLER)
 
     set(CPACK_WIX_UI_BANNER
         "${CMAKE_CURRENT_SOURCE_DIR}/install/windows/arrow-wix-banner.bmp")
+    set(ODBC_DOC_INSTALL_DIR "doc")
   else()
     set(ODBC_UNIX_FILE_NAME
         "ArrowFlightSQLODBC-${CPACK_PACKAGE_VERSION_MAJOR}.${ODBC_PACKAGE_VERSION_MINOR}.${ODBC_PACKAGE_VERSION_PATCH}"