[util] Add missing <new> header

The <new> header was previously in one of the util headers, masking that
it was missing from these files.

src/kernel/memory_bootstrap.cpp

@@ -1,3 +1,4 @@
+#include <new>
 #include <utility>
 
 #include <arch/memory.h>

src/libraries/util/util/vector.h

@@ -3,6 +3,7 @@
 /// Definition of a simple dynamic vector collection for use in kernel space
 
 #include <assert.h>
+#include <new>
 #include <string.h>
 #include <utility>