telldus-core: fix compilation with libcxx 10

Missing headers and wrong namespace.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

utils/telldus-core/patches/950-pthread.patch

@@ -0,0 +1,21 @@
+--- a/common/Thread.cpp
++++ b/common/Thread.cpp
+@@ -16,6 +16,8 @@
+ #endif
+ #include "common/EventHandler.h"
+ 
++#include <pthread.h>
++
+ namespace TelldusCore {
+ 
+ class ThreadPrivate {
+--- a/service/Timer.cpp
++++ b/service/Timer.cpp
+@@ -7,6 +7,7 @@
+ #include "service/Timer.h"
+ #ifdef _WINDOWS
+ #else
++#include <pthread.h>
+ #include <sys/time.h>
+ #include <errno.h>
+ #endif