package/leveldb: fix malformatted patch

Fixes:
http://autobuild.buildroot.net/results/e46/e46d67d0e8b4b47fc09e631ca46ed02594ced801/

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

package/leveldb/0002-CMake-install-libmemenv.a.patch

@@ -16,7 +16,7 @@ diff --git a/CMakeLists.txt b/CMakeLists.txt
 index a65afbf..83b2425 100644
 --- a/CMakeLists.txt
 +++ b/CMakeLists.txt
-@@ -199,6 +199,24 @@ target_sources(leveldb
+@@ -187,6 +187,30 @@ target_sources(leveldb
      "${LEVELDB_PUBLIC_INCLUDE_DIR}/write_batch.h"
  )