* Add PATENTS file
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=
1897773003
Review URL: https://codereview.chromium.org/
1897773003
"third_party/externals/libpng" : "https://skia.googlesource.com/third_party/libpng.git@5765a2224946b953ec6702bd01205af475f8c80a",
"third_party/externals/giflib" : "https://android.googlesource.com/platform/external/giflib.git@ab10e256df4f684260ca239905b1cec727181f6c",
- "third_party/externals/dng_sdk" : "https://android.googlesource.com/platform/external/dng_sdk.git@e95f96bb9d29978211250ee764ba78731ad316df",
+ "third_party/externals/dng_sdk" : "https://android.googlesource.com/platform/external/dng_sdk.git@96443b262250c390b0caefbf3eed8463ba35ecae",
"third_party/externals/piex" : "https://android.googlesource.com/platform/external/piex.git@be908191d0a6883a95333bdc0bca749c9b830969",
"third_party/externals/libjpeg-turbo" : "https://skia.googlesource.com/third_party/libjpeg-turbo.git@b38b934d246fca482eb6801f4ce79422954a635e",