Ignored files that cause build errors

Protobuf.podspec

@@ -7,9 +7,8 @@ Pod::Spec.new do |s|
   s.authors  = { 'The Protocol Buffers contributors' => 'protobuf@googlegroups.com' }
 
   s.source_files = 'objectivec/*.{h,m}', 'objectivec/google/protobuf/*.pbobjc.h', 'objectivec/google/protobuf/Any.pbobjc.m', 'objectivec/google/protobuf/Api.pbobjc.m', 'objectivec/google/protobuf/Descriptor.pbobjc.m', 'objectivec/google/protobuf/Empty.pbobjc.m', 'objectivec/google/protobuf/FieldMask.pbobjc.m', 'objectivec/google/protobuf/SourceContext.pbobjc.m', 'objectivec/google/protobuf/Struct.pbobjc.m' 'objectivec/google/protobuf/Type.pbobjc.m', 'objectivec/google/protobuf/Wrappers.pbobjc.m'
-  # The following is a .m umbrella file, and would cause duplicate symbol
-  # definitions:
-  s.exclude_files = 'objectivec/GPBProtocolBuffers.m'
+  # The following would cause duplicate symbol definitions
+  s.exclude_files = 'objectivec/GPBProtocolBuffers.m', 'objectivec/google/protobuf/Api.pobjc.m', 'objectivec/google/protobuf/Type.pobjc.m'
   # The .m's of the proto Well-Known-Types under google/protobuf are #imported
   # by GPBWellKnownTypes.m. So we can't compile them (duplicate symbols), but we
   # need them available for the importing: