Fix for downloading the wrong binary in the online compiler

Author: bridadan

tools/toolchains/mbed_toolchain.py

@@ -763,7 +763,7 @@ def link_program(self, r, tmp_path, name):
         self.mem_stats(mapfile)
 
         self.notify.var("compile_succeded", True)
-        self.notify.var("binary", filename)
+        self.notify.var("binary", full_path)
 
         return full_path, updatable