IWYU: Include all headers for symbols used in files.

Semi-automatically taking the the misc-include-cleaner warnings
by clang-tidy and fixing files to be self-contained.

Change-Id: Iaaa2b2ec9d6dcce547fa5cb6b4f056dfc8c781ff

sharpyuv/sharpyuv_sse2.c

@@ -14,9 +14,13 @@
 #include "sharpyuv/sharpyuv_dsp.h"
 
 #if defined(WEBP_USE_SSE2)
-#include <stdlib.h>
 #include <emmintrin.h>
 
+#include <stdlib.h>
+
+#include "src/dsp/cpu.h"
+#include "src/webp/types.h"
+
 static uint16_t clip_SSE2(int v, int max) {
   return (v < 0) ? 0 : (v > max) ? max : (uint16_t)v;
 }