[Tizen] Check signature value using xmlsec1 library

Based on API provided by xmlsec1 library, signature value and reference are checked.
xmlIndentTreeOutput is a global variable in libxml2 library, which be used by xmlBufNodeDump() function indirectly. xmlBufNodeDump() is a key function for xml tree.  And this function maybe used by parsing xml when I search it from Google.

And xmlIndentTreeOutput is set 1 by default. So I think we can remove this line.