[NaCl SDK] Add nacl_mounts to NaCl SDK build. Experimental for now.

native_client_sdk/src/build_tools/generate_make.py

Index: native_client_sdk/src/build_tools/generate_make.py
diff --git a/native_client_sdk/src/build_tools/generate_make.py b/native_client_sdk/src/build_tools/generate_make.py
index ac7d01ccebf607b434812a35082116646316d172..79286e41f3cedd8706dd732b9e448c060ff55d5b 100755
--- a/native_client_sdk/src/build_tools/generate_make.py
+++ b/native_client_sdk/src/build_tools/generate_make.py
@@ -283,7 +283,8 @@ DSC_FORMAT = {
     'DATA': (list, '', False),
     'TITLE': (str, '', False),
     'DESC': (str, '', False),
-    'INFO': (str, '', False)
+    'INFO': (str, '', False),
+    'EXPERIMENTAL': (bool, [True, False], False)
 }
 
 
@@ -527,6 +528,8 @@ def main(argv):
       action='store_true', dest='pnacl', default=False)
   parser.add_option('--host', help='Create host examples.',
       action='store_true', dest='host', default=False)
+  parser.add_option('--experimental', help='Create experimental examples.',
+      action='store_true', dest='experimental', default=False)
 
   toolchains = []
   platform = getos.GetPlatform()
@@ -554,6 +557,10 @@ def main(argv):
       print 'Skipping %s, not in [%s].' % (filename, ', '.join(toolchains))
       continue
 
+    if desc.get('EXPERIMENTAL', False) and not options.experimental:
+      print 'Skipping %s, experimental only.' % (filename,)
+      continue
+
     srcroot = os.path.dirname(os.path.abspath(filename))
     if not ProcessProject(srcroot, options.dstroot, desc, toolchains):
       ErrorExit('\n*** Failed to process project: %s ***' % filename)