Adding tool to execute a remote cell-based build via Bazel.

Change-Id: I69f94c3664d8ce75e3691a9e4d8d0a2271406a4c
diff --git a/tools/dev/bin/cell-build b/tools/dev/bin/cell-build
index 524795c..8196b32 100755
--- a/tools/dev/bin/cell-build
+++ b/tools/dev/bin/cell-build
@@ -22,6 +22,10 @@
     # Make sure the remote build machine is on the same commit hash as the local one
     remoteCommit=\$(git log -n 1 | head -n1 | cut -d\  -f2)
 
+    # Clean-up the workspace and stash away any changes.
+    git clean -f
+    git stash
+
     if [ "\$remoteCommit" != "$baseCommit" ]; then
         git checkout master
         git pull
@@ -29,10 +33,8 @@
     fi
 
     # Apply the patch
-    git clean -f
-    git stash
     git apply --no-add /tmp/$baseCommit.patch
 
-    # Run the build
-    SHLVL=1 bazel build onos
+    # Run the build (neutralizing known environment mutations)
+    SHLVL=1 SSH_CLIENT=0 SSH_CONNECTION=0 bazel build onos
 "