include what you use (array)

New yocto rebase compiler has been failing on missing includes so add
them in.

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: Iebd2fcc5d248528e04d3c58b4d4ecd2f5694f4aa
diff --git a/attn/pel/extended_user_header.hpp b/attn/pel/extended_user_header.hpp
index d6486f1..3c782a8 100644
--- a/attn/pel/extended_user_header.hpp
+++ b/attn/pel/extended_user_header.hpp
@@ -4,6 +4,8 @@
 #include "pel_section.hpp"
 #include "stream.hpp"
 
+#include <array>
+
 namespace attn
 {
 namespace pel
diff --git a/attn/pel/primary_src.hpp b/attn/pel/primary_src.hpp
index 659cb48..be40448 100644
--- a/attn/pel/primary_src.hpp
+++ b/attn/pel/primary_src.hpp
@@ -4,6 +4,8 @@
 #include "pel_section.hpp"
 #include "stream.hpp"
 
+#include <array>
+
 namespace attn
 {
 namespace pel