kodi: fix gcc7.x compile error, from buildroot

package/kodi/Makefile

@@ -28,7 +28,7 @@ PKG_BUILDDEP+=		libgpg-error libvorbis
 PKG_BUILDDEP+=		swig-host liblzo-host libpng-host libjpeg-turbo-host
 PKG_BUILDDEP+=		zip-host unzip-host giflib-host libsquish libdcadec
 PKG_BUILDDEP+=		libcrossguid libressl xz bzip2 liblzo
-PKG_NEEDS:=		threads c++
+PKG_NEEDS:=		threads c++ iconv
 PKG_URL:=		http://kodi.tv/
 PKG_SITES:=		https://github.com/xbmc/xbmc/archive/
 

package/kodi/patches/patch-xbmc_filesystem_FTPParse_cpp

@@ -0,0 +1,71 @@
+--- xbmc-17.3-Krypton.orig/xbmc/filesystem/FTPParse.cpp	2017-05-24 22:49:32.000000000 +0200
++++ xbmc-17.3-Krypton/xbmc/filesystem/FTPParse.cpp	2017-07-22 21:01:29.538581226 +0200
+@@ -34,7 +34,7 @@ CFTPParse::CFTPParse()
+   m_time = 0;
+ }
+ 
+-string CFTPParse::getName()
++std::string CFTPParse::getName()
+ {
+   return m_name;
+ }
+@@ -59,16 +59,16 @@ time_t CFTPParse::getTime()
+   return m_time;
+ }
+ 
+-void CFTPParse::setTime(string str)
++void CFTPParse::setTime(std::string str)
+ {
+   /* Variables used to capture patterns via the regexes */
+-  string month;
+-  string day;
+-  string year;
+-  string hour;
+-  string minute;
+-  string second;
+-  string am_or_pm;
++  std::string month;
++  std::string day;
++  std::string year;
++  std::string hour;
++  std::string minute;
++  std::string second;
++  std::string am_or_pm;
+ 
+   /* time struct used to set the time_t variable */
+   struct tm time_struct = {};
+@@ -338,21 +338,21 @@ int CFTPParse::getDayOfWeek(int month, i
+   return day_of_week;
+ }
+ 
+-int CFTPParse::FTPParse(string str)
++int CFTPParse::FTPParse(std::string str)
+ {
+   /* Various variable to capture patterns via the regexes */
+-  string permissions;
+-  string link_count;
+-  string owner;
+-  string group;
+-  string size;
+-  string date;
+-  string name;
+-  string type;
+-  string stuff;
+-  string facts;
+-  string version;
+-  string file_id;
++  std::string permissions;
++  std::string link_count;
++  std::string owner;
++  std::string group;
++  std::string size;
++  std::string date;
++  std::string name;
++  std::string type;
++  std::string stuff;
++  std::string facts;
++  std::string version;
++  std::string file_id;
+ 
+   /* Regex for standard Unix listing formats */
+   pcrecpp::RE unix_re("^([-bcdlps])" // type