waf: reorganize destination of binaries in Tools

It makes more sense for Hello to be an example and for CPUInfo and Replay to be
placed inside a `build/<board>/tools/` directory.

Tools/CPUInfo/wscript

@@ -7,4 +7,5 @@ def build(bld):
     ardupilotwaf.program(
         bld,
         use='ap',
+        blddestdir='tools',
     )

Tools/Hello/wscript

@@ -4,7 +4,7 @@
 import ardupilotwaf
 
 def build(bld):
-    ardupilotwaf.program(
+    ardupilotwaf.example(
         bld,
         use='ap',
     )

Tools/Replay/wscript

@@ -7,4 +7,5 @@ def build(bld):
     ardupilotwaf.program(
         bld,
         use='ap',
+        blddestdir='tools',
     )