package/c-icap: fix bzip2 configure option

The configure option controlling bzip2 support got its current name in
2012 with its initial commit:

https://sourceforge.net/p/c-icap/code/890/#diff-2

This patch fixes the configure warning:

configure: WARNING: unrecognized options: [...] --without-bzip2

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/c-icap/c-icap.mk

@@ -36,10 +36,10 @@ C_ICAP_CONF_OPTS += --without-bdb
 endif
 
 ifeq ($(BR2_PACKAGE_BZIP2),y)
-C_ICAP_CONF_OPTS += --with-bzip2
+C_ICAP_CONF_OPTS += --with-bzlib
 C_ICAP_DEPENDENCIES += bzip2
 else
-C_ICAP_CONF_OPTS += --without-bzip2
+C_ICAP_CONF_OPTS += --without-bzlib
 endif
 
 ifeq ($(BR2_PACKAGE_ZLIB),y)