Windows build - fix signtool search path to take modern SDKs into account

cmake/install_macros.cmake

@@ -184,10 +184,13 @@ IF(WIN32)
    SET(SIGNTOOL_PARAMETERS 
      /a /t http://timestamp.globalsign.com/?signature=sha2
      CACHE STRING "parameters for signtool (list)")
+    IF(NOT SIGNTOOL_EXECUTABLE)
+      FILE(GLOB path_list
+        "$ENV{ProgramFiles} (x86)/Windows Kits/*/bin/*/x64"
+        "$ENV{ProgramFiles} (x86)/Windows Kits/*/App Certification Kit"
+      )
       FIND_PROGRAM(SIGNTOOL_EXECUTABLE signtool
-      PATHS "$ENV{ProgramFiles}/Microsoft SDKs/Windows/v7.0A/bin"
-      "$ENV{ProgramFiles}/Windows Kits/8.0/bin/x86"
-      "$ENV{ProgramFiles}/Windows Kits/8.1/bin/x86"
+        PATHS ${path_list}
       )
       IF(NOT SIGNTOOL_EXECUTABLE)
         MESSAGE(FATAL_ERROR
@@ -195,6 +198,7 @@ IF(WIN32)
       ENDIF()
       MARK_AS_ADVANCED(SIGNTOOL_EXECUTABLE  SIGNTOOL_PARAMETERS)
     ENDIF()
+  ENDIF()
 ENDIF()