[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 66cf47f026ddecaf77adf939142a6f7c2a71c605..8367bb3d5dc549d09b69c55741eb05791ef57b82 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()
@@ -557,6 +560,10 @@ 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)