cloog: remove package

This host-only package was used to enable graphite support in GCC 4.9,
but Buildroot no longer supports Graphite optimizations in GCC 4.9
(only GCC >= 5.x is supported). Therefore, we can remove the cloog
package.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

DEVELOPERS

@@ -1602,7 +1602,6 @@ F:	package/tovid/
 F:	package/xorriso/
 
 N:	Steve Thomas <scjthm@live.com>
-F:	package/cloog/
 F:	package/isl/
 
 N:	Steven Noonan <steven@uplinklabs.net>

package/cloog/cloog.hash

@@ -1,2 +0,0 @@
-# Locally computed
-sha256	325adf3710ce2229b7eeb9e84d3b539556d093ae860027185e7af8a8b00a750e	cloog-0.18.4.tar.gz

package/cloog/cloog.mk

@@ -1,17 +0,0 @@
-################################################################################
-#
-# cloog
-#
-################################################################################
-
-CLOOG_VERSION = 0.18.4
-CLOOG_SITE = http://www.bastoul.net/cloog/pages/download
-CLOOG_LICENSE = LGPL-2.1+
-HOST_CLOOG_DEPENDENCIES = host-gmp host-isl
-# Our libtool patch doesn't apply, and since this package is only
-# built for the host, we don't really care about it.
-CLOOG_LIBTOOL_PATCH = NO
-
-HOST_CLOOG_CONF_OPTS = --with-isl=system --with-polylib=no
-
-$(eval $(host-autotools-package))