Add the CocoaPods spec files for libwebp, update to v1.0.1

libwebp

@@ -1 +1 @@
-Subproject commit 698b8844e38a0c5ca50bb20f866e71291bfc3b36
+Subproject commit e85d3313d6d52b1e9c6c181b488fc0831a747de8

libwebp.podspec

@@ -0,0 +1,62 @@
+Pod::Spec.new do |s|
+  s.name             = 'libwebp'
+  s.version          = '1.0.1'
+  s.summary          = 'Library to encode and decode images in WebP format.'
+  s.homepage         = 'https://developers.google.com/speed/webp/'
+  s.authors          = 'Google Inc.'
+  s.license          = { :type => 'BSD', :file => 'COPYING' }
+  s.source           = { :git => 'https://chromium.googlesource.com/webm/libwebp', :tag => 'v' + s.version.to_s }
+
+  s.compiler_flags = '-D_THREAD_SAFE'
+  s.requires_arc = false
+
+  s.osx.deployment_target = '10.8'
+  s.ios.deployment_target = '6.0'
+  s.tvos.deployment_target = '9.0'
+  s.watchos.deployment_target = '2.0'
+
+  s.pod_target_xcconfig = {
+    'USER_HEADER_SEARCH_PATHS' => '$(inherited) ${PODS_ROOT}/libwebp/**'
+  }
+
+  s.subspec 'webp' do |ss|
+    ss.header_dir = 'webp'
+    ss.source_files = 'src/webp/*.h'
+  end
+
+  s.subspec 'core' do |ss|
+    ss.source_files = [
+      'src/utils/*.{h,c}',
+      'src/dsp/*.{h,c}',
+      'src/enc/*.{h,c}',
+      'src/dec/*.{h,c}'
+    ]
+    ss.dependency 'libwebp/webp'
+  end
+
+  s.subspec 'utils' do |ss|
+    ss.dependency 'libwebp/core'
+  end
+
+  s.subspec 'dsp' do |ss|
+    ss.dependency 'libwebp/core'
+  end
+
+  s.subspec 'enc' do |ss|
+    ss.dependency 'libwebp/core'
+  end
+
+  s.subspec 'dec' do |ss|
+    ss.dependency 'libwebp/core'
+  end
+
+  s.subspec 'demux' do |ss|
+    ss.source_files = 'src/demux/*.{h,c}'
+    ss.dependency 'libwebp/core'
+  end
+
+  s.subspec 'mux' do |ss|
+    ss.source_files = 'src/mux/*.{h,c}'
+    ss.dependency 'libwebp/core'
+  end
+end