Refactor of bmcImages

bmcImages were in image_verify.hpp but it is used not only in image
verification, but elsewhere.

Move it into a more generic header file, images.hpp, so it makes more
clear that users of bmcImages include images.hpp instead of
image_verify.hpp

Tested: Verify the code pass the build.

Change-Id: If9adf315eee9047d9d08ab93ed7c0ff3c97f7a1e
Signed-off-by: Lei YU <mine260309@gmail.com>
diff --git a/Makefile.am b/Makefile.am
index 859b35d..1ac3914 100755
--- a/Makefile.am
+++ b/Makefile.am
@@ -5,6 +5,7 @@
 	download_manager.hpp \
 	watch.hpp \
 	version.hpp \
+	images.hpp \
 	image_manager.hpp \
 	item_updater.hpp \
 	activation.hpp