rename include/zlib.h to include/u-boot/zlib.h

Some systems have zlib.h installed in /usr/include/. This isn't the
desired file for u-boot code - we want the one in include/zlib.h.
This rename will avoid the conflict.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/lib_generic/crc32.c b/lib_generic/crc32.c
index b6a7a91..3927ce1 100644
--- a/lib_generic/crc32.c
+++ b/lib_generic/crc32.c
@@ -17,7 +17,7 @@
 #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
 #include <watchdog.h>
 #endif
-#include "zlib.h"
+#include "u-boot/zlib.h"
 
 #define local static
 #define ZEXPORT	/* empty */