MNEMONIC-654:Fix non-1024 aligned buffe size in NativeLibraryLoader class

Signed-off-by: Chunyong He <chunyong.he@gmail.com>
diff --git a/mnemonic-common/src/main/java/org/apache/mnemonic/primitives/NativeLibraryLoader.java b/mnemonic-common/src/main/java/org/apache/mnemonic/primitives/NativeLibraryLoader.java
index 07d3f6d..c5a713e 100644
--- a/mnemonic-common/src/main/java/org/apache/mnemonic/primitives/NativeLibraryLoader.java
+++ b/mnemonic-common/src/main/java/org/apache/mnemonic/primitives/NativeLibraryLoader.java
@@ -32,7 +32,7 @@
  */
 public final class NativeLibraryLoader {
     
-    private static final int COPYING_BUFFER_LENGTH = 80960;
+    private static final int COPYING_BUFFER_LENGTH = 40960;
     
     /**
      * private constructor that prevents it from instantiating.