Patch accumulo-env.sh to run on Mac OS X (#300)

While https://github.com/apache/accumulo/pull/4152 is making its way thru, this patch allows for running existing code on Mac OS X.
diff --git a/bin/impl/install/accumulo.sh b/bin/impl/install/accumulo.sh
index 04b9a2d..293f089 100755
--- a/bin/impl/install/accumulo.sh
+++ b/bin/impl/install/accumulo.sh
@@ -47,6 +47,10 @@
 
 conf=$ACCUMULO_HOME/conf
 
+# On BSD systems (e.g., Mac OS X), paste(1) requires an argument.
+
+sed -i'' -e 's!paste -sd:)!paste -sd: -)!' "$conf/accumulo-env.sh"
+
 cp "$UNO_HOME"/conf/accumulo/common/* "$conf"
 if [[ $ACCUMULO_VERSION =~ ^1\..*$ ]]; then
   accumulo_conf=$conf/accumulo-site.xml