utils: Add various bit manipulation related utilites

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
diff --git a/configure.ac b/configure.ac
index a53c71d..fbddb34 100644
--- a/configure.ac
+++ b/configure.ac
@@ -13,6 +13,7 @@
 	Makefile
 	src/Makefile
 	include/Makefile
+	include/gapk/Makefile
 ])
 
 # Checks for programs.