Added patch file.

libva-slice.patch

@@ -0,0 +1,32 @@
+From bc7802d8ae34c3af02c85df3166aafcdd92707fb Mon Sep 17 00:00:00 2001
+From: "Xu, Zhengguo" <zhengguo.xu@intel.com>
+Date: Thu, 19 Sep 2019 21:09:19 -0400
+Subject: [PATCH] Add missed slice parameter 'slice_data_num_emu_prevn_bytes'
+
+Signed-off-by: Xu, Zhengguo <zhengguo.xu@intel.com>
+---
+ va/va_dec_hevc.h | 4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/va/va_dec_hevc.h b/va/va_dec_hevc.h
+index 25234f1..a9f48fb 100644
+--- a/va/va_dec_hevc.h
++++ b/va/va_dec_hevc.h
+@@ -381,6 +381,8 @@ typedef struct  _VASliceParameterBufferHEVC
+     uint32_t                slice_data_offset;
+     /** \brief Slice data buffer flags. See \c VA_SLICE_DATA_FLAG_XXX. */
+     uint32_t                slice_data_flag;
++    /** \brief Number of emulation prevention bytes in slice head. */
++    uint16_t                slice_data_num_emu_prevn_bytes;
+     /**
+      * \brief Byte offset from NAL unit header to the begining of slice_data().
+      *
+@@ -488,7 +490,7 @@ typedef struct  _VASliceParameterBufferHEVC
+     /**@}*/
+ 
+     /** \brief Reserved bytes for future use, must be zero */
+-    uint32_t                va_reserved[VA_PADDING_LOW - 1];
++    uint32_t                va_reserved[VA_PADDING_LOW - 2];
+ } VASliceParameterBufferHEVC;
+ 
+ /**