autogen.sh: make sure m4 dir exist

Change-Id: I50c4d017911a66a35d3ae496aa790df8a8508ebc
Signed-off-by: WaLyong Cho <walyong.cho@samsung.com>

diff --git a/autogen.sh b/autogen.sh
index c4d77f3..58b2be4 100755 (executable)
--- a/autogen.sh
+++ b/autogen.sh
@@ -17,6 +17,9 @@ fi
 # ./configure anyway.
 touch README INSTALL
 
+# make sure m4 dir exist
+mkdir -p m4
+
 autoreconf --force --install --verbose || exit $?
 
 if [ "x$opt" = "xc" ]; then