[NaCl SDK] A bunch of spelling fixes.

native_client_sdk/src/build_tools/manifest_util.py

Index: native_client_sdk/src/build_tools/manifest_util.py
diff --git a/native_client_sdk/src/build_tools/manifest_util.py b/native_client_sdk/src/build_tools/manifest_util.py
index fad583a3a5122ce4ada54010f31a762b2903260a..51cf24ccd77c19fafbb3d4a6c5aa0d13e0ea6b3d 100644
--- a/native_client_sdk/src/build_tools/manifest_util.py
+++ b/native_client_sdk/src/build_tools/manifest_util.py
@@ -156,7 +156,7 @@ class Archive(dict):
     """Update the size and checksum information for this archive
     based on the content currently at the URL.
 
-    This allows the template mandifest to be maintained without
+    This allows the template manifest to be maintained without
     the need to size and checksums to be present.
     """
     template = string.Template(self['url'])
@@ -528,7 +528,7 @@ class SDKManifest(object):
       local_bundle.MergeWithBundle(bundle)
 
   def MergeManifest(self, manifest):
-    '''Merge another manifest into this manifest, disallowing overiding.
+    '''Merge another manifest into this manifest, disallowing overriding.
 
     Args
       manifest: The manifest to merge.