Change include style to use system includes

The libcper header files in `libcper` are installed to
`usr/include/libcper`. Use that system includes in `libcper` source
instead of using the project includes.

Change-Id: I596edc2c754dae4829844f535a1e34caa246fb43
Signed-off-by: Thu Nguyen <thu@os.amperecomputing.com>
diff --git a/generator/gen-utils.c b/generator/gen-utils.c
index e69f0b5..03f6b8d 100644
--- a/generator/gen-utils.c
+++ b/generator/gen-utils.c
@@ -5,8 +5,8 @@
  **/
 #include <stdlib.h>
 #include <time.h>
-#include "BaseTypes.h"
-#include "gen-utils.h"
+#include <libcper/BaseTypes.h>
+#include <libcper/generator/gen-utils.h>
 
 //Generates a random section of the given byte size, saving the result to the given location.
 //Returns the length of the section as passed in.