include <new> header for benefit of new clang builds

TBR=kjellander@chromium.org
BUG=libyuv:712
TEST=local builds still work

Change-Id: I040e8edc40aafd820d2a29629fe7aec5c049bc6b
Reviewed-on: https://chromium-review.googlesource.com/576971Reviewed-by: Frank Barchard <fbarchard@google.com>
Commit-Queue: Frank Barchard <fbarchard@google.com>

source/mjpeg_decoder.cc

@@ -13,6 +13,10 @@
 #ifdef HAVE_JPEG
 #include <assert.h>
 
+#ifdef __cplusplus
+#include <new>
+#endif
+
 #if !defined(__pnacl__) && !defined(__CLR_VER) && \
     !defined(COVERAGE_ENABLED) && !defined(TARGET_IPHONE_SIMULATOR)
 // Must be included before jpeglib.

util/psnr_main.cc

@@ -22,6 +22,7 @@
 #define _CRT_SECURE_NO_WARNINGS
 #endif
 
+#include <new>
 #include <stddef.h>
 #include <stdio.h>
 #include <stdlib.h>

util/yuvconvert.cc

@@ -15,6 +15,7 @@
 #define _CRT_SECURE_NO_WARNINGS
 #endif
 
+#include <new>
 #include <stddef.h>
 #include <stdio.h>
 #include <stdlib.h>