scons: use python3-compatible print()

These changes were generated using python's `2to3` tool.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102852
Reported-by: Alex Granni <liviuprodea@yahoo.com>
Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
diff --git a/SConstruct b/SConstruct
index 696718c..0215aa8 100644
--- a/SConstruct
+++ b/SConstruct
@@ -50,10 +50,10 @@
     pass
 else:
     targets = targets.split(',')
-    print 'scons: warning: targets option is deprecated; pass the targets on their own such as'
-    print
-    print '  scons %s' % ' '.join(targets)
-    print
+    print('scons: warning: targets option is deprecated; pass the targets on their own such as')
+    print()
+    print('  scons %s' % ' '.join(targets))
+    print()
     COMMAND_LINE_TARGETS.append(targets)