perf scripts python: Add Python 3 support to SchedGui.py

Fix a single syntax error in SchedGui.py to support both Python 2 and
Python 3. This should have no functional change.

Signed-off-by: Jeremy Cline <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Herton Krzesinski <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/0100016341a72d26-75729663-fe55-4309-8c9b-302e065ed2f1-000000@email.amazonses.com
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

Author: jeremycline

tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/SchedGui.py

@@ -11,7 +11,7 @@
 try:
 	import wx
 except ImportError:
-	raise ImportError, "You need to install the wxpython lib for this script"
+	raise ImportError("You need to install the wxpython lib for this script")
 
 
 class RootFrame(wx.Frame):