lib: bzip2: move bzip2 files to lib/bzip2/ directory

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
diff --git a/lib/bzip2/Makefile b/lib/bzip2/Makefile
new file mode 100644
index 0000000..929c24e
--- /dev/null
+++ b/lib/bzip2/Makefile
@@ -0,0 +1,2 @@
+obj-y += bzlib.o bzlib_crctable.o bzlib_decompress.o \
+	bzlib_randtable.o bzlib_huffman.o