Add more missing includes after removing the implicit common.h

Signed-off-by: Martin Storsjö <martin@martin.st>

libavcodec/ppc/dsputil_ppc.c

@@ -23,6 +23,7 @@
 #include <string.h>
 
 #include "libavutil/cpu.h"
+#include "libavutil/mem.h"
 #include "libavcodec/dsputil.h"
 #include "dsputil_altivec.h"
 

libavcodec/sparc/dsputil_vis.c

@@ -27,6 +27,7 @@
 #include <inttypes.h>
 
 #include "libavcodec/dsputil.h"
+#include "libavutil/mem.h"
 #include "dsputil_vis.h"
 
 #include "vis.h"

libavfilter/vf_drawtext.c

@@ -30,6 +30,7 @@
 #include <time.h>
 
 #include "libavutil/colorspace.h"
+#include "libavutil/common.h"
 #include "libavutil/file.h"
 #include "libavutil/eval.h"
 #include "libavutil/opt.h"

libavutil/x86/w64xmmtest.h

@@ -23,6 +23,7 @@
 #include <stdint.h>
 #include <stdlib.h>
 #include <stdarg.h>
+#include <string.h>
 
 #include "libavutil/bswap.h"