Adds coverity scan script.

makescan.sh

@@ -0,0 +1,26 @@
+#!/bin/sh
+#
+
+rm -r cov-int
+rm snapraid.tgz
+
+make distclean
+
+if ! ./configure ; then
+	exit 1
+fi
+
+export PATH=$PATH:contrib/cov-analysis-linux-7.0.2/bin
+
+if ! cov-build --dir cov-int make; then
+	exit 1
+fi
+
+tar czf snapraid.tgz cov-int
+
+rm -r cov-int
+
+echo snapraid.tgz ready to upload to https://scan.coverity.com/projects/1986/builds/new
+
+
+