vmodtool: make vcs_version static & move attribute to a better place

Reported by Flexelint.

Ref c8c016d

Author: nigoroll

lib/libvcc/vmodtool.py

@@ -1244,8 +1244,8 @@ def vmod_data(self, fo):
         vcs = json.dumps(self.vcs())
         vmd = "Vmod_%s_Data" % self.modname
         fo.write('\n')
-        fo.write('__attribute__((section(".vmod_vcs"), used))\n')
-        fo.write('const char vmod_vcs[] = %s;' % vcs)
+        fo.write('static const char vmod_vcs[] ')
+        fo.write('__attribute__((section(".vmod_vcs"), used)) = %s;\n' % vcs)
         for i in (714, 759, 765):
             fo.write("/*lint -esym(%d, %s) */\n" % (i, vmd))
         fo.write("\nextern const struct vmod_data %s;\n" % vmd)