Fixes podspec for master facebook#11640

Summary:
Currently the master Podspec is broken because tvOS files are being included, to avoid this compile error the file is being excluded.

facebook@c92ad5f

Thats the commit which introduced the breakage anything later that that will fail. Aka RN 0.41 will fail because of this.

**Test plan (required)**

Tested on new project against master

// cc ide
Closes facebook#11667

Differential Revision: D4375453

Pulled By: ericvicenti

fbshipit-source-id: 035cdb8ef36054b40d1aaf59551cdc2e16f0cb19

React.podspec

@@ -34,11 +34,16 @@ Pod::Spec.new do |s|
     ss.dependency      'React/yoga'
     ss.dependency      'React/cxxreact'
     ss.source_files  = "React/**/*.{c,h,m,mm,S}"
-    ss.exclude_files = "**/__tests__/*", "IntegrationTests/*", "ReactCommon/yoga/*"
+    ss.exclude_files = "**/__tests__/*", "IntegrationTests/*", "React/**/RCTTVView.*", "ReactCommon/yoga/*"
     ss.frameworks    = "JavaScriptCore"
     ss.libraries     = "stdc++"
   end
 
+  s.subspec 'tvOS' do |ss|
+    ss.dependency       'React/Core'
+    ss.source_files   = "React/**/RCTTVView.{h, m}"
+  end
+
   s.subspec 'jschelpers' do |ss|
     ss.source_files = 'ReactCommon/jschelpers/{JavaScriptCore,JSCWrapper}.{cpp,h}'
     ss.header_dir   = 'jschelpers'