Move thread_pool.h into utils so it can be shared by more than one example.

native_client_sdk/src/libraries/utils/library.dsc

Index: native_client_sdk/src/libraries/utils/library.dsc
===================================================================
--- native_client_sdk/src/libraries/utils/library.dsc	(revision 0)
+++ native_client_sdk/src/libraries/utils/library.dsc	(revision 0)
@@ -0,0 +1,29 @@
+{
+  'TOOLS': ['newlib', 'glibc', 'pnacl', 'win'],
+  'SEARCH': [
+    '.',
+    'pepper'

[binji, 2013/06/05 00:01:09]

not needed

[nfullagar1, 2013/06/05 00:11:45]

Done.

+  ],
+  'TARGETS': [

[binji, 2013/06/05 00:01:09]

remove TARGETS

[nfullagar1, 2013/06/05 00:11:45]

this was needed to make the python scripts pass.

+    {
+      'NAME' : 'utils',
+      'TYPE' : 'lib',
+      'SOURCES' : [
+        'utils.cc'
+      ]
+    }
+  ],
+  'HEADERS': [
+    {
+      'FILES': [
+        'auto_lock.h',
+        'macros.h',
+        'ref_object.h',
+        'thread_pool.h'
+      ],
+      'DEST': 'include/utils',
+    }
+  ],
+  'DEST': 'src',
+  'NAME': 'utils',
+}