stdout-flush-wrapper-debug.sh: Handle --version flag as passed by LAVA

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: I24c2a7feff280ac7be8b0e249bdc77cf3a7c47da
diff --git a/stdout-flush-wrapper-debug.sh b/stdout-flush-wrapper-debug.sh
index abb6c48..00a6231 100755
--- a/stdout-flush-wrapper-debug.sh
+++ b/stdout-flush-wrapper-debug.sh
@@ -6,6 +6,11 @@
 # but not completely, so we just give LAVA more time with some sleep after
 # command termination.
 
+if [ "$1" == "--version" ]; then
+    echo "$0 1.0"
+    exit
+fi
+
 delay="$1"
 shift
 cmd="$1"