package/rocksdb: fix bzip2 option

Commit 95bf830e2ae6b5548c17fd3ce6ac1a8d2aa0c8b6 forgot to replace
ROCKSDB_CONF_OPTS by ROCKSDB_MAKE_OPTS for BR2_PACKAGE_BZIP2

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/rocksdb/rocksdb.mk

@@ -14,9 +14,9 @@ ROCKSDB_MAKE_OPTS = PORTABLE=1
 
 ifeq ($(BR2_PACKAGE_BZIP2),y)
 ROCKSDB_DEPENDENCIES += bzip2
-ROCKSDB_CONF_OPTS += ROCKSDB_DISABLE_BZ2=0
+ROCKSDB_MAKE_OPTS += ROCKSDB_DISABLE_BZ2=0
 else
-ROCKSDB_CONF_OPTS += ROCKSDB_DISABLE_BZ2=1
+ROCKSDB_MAKE_OPTS += ROCKSDB_DISABLE_BZ2=1
 endif
 
 ifeq ($(BR2_PACKAGE_GFLAGS),y)