scons: Build the progs into seperate dirs as well.
diff --git a/progs/SConstruct b/progs/SConstruct
index bce48f7..4d268cc 100644
--- a/progs/SConstruct
+++ b/progs/SConstruct
@@ -60,5 +60,6 @@
 
 SConscript(
     'SConscript',
+    build_dir = env['build'],
     duplicate = 0 # http://www.scons.org/doc/0.97/HTML/scons-user/x2261.html
 )