Automatically retry builds when a buildkite agent is lost (#5380)

Sometimes the build agents get lost or die (error codes -1 and 2). Retry automatically a maximum of 2 times if this happens.

Error code reference:

* -1: Agent was lost
* 0: Build successful
* 1: There was an error in your code
* 2: The build stopped abruptly
* 255: The build was cancelled

1 files changed, 1 insertions, 0 deletions

diff --git a/changelog.d/5380.misc b/changelog.d/5380.misc
new file mode 100644
index 0000000000..099bba414c
--- /dev/null
+++ b/changelog.d/5380.misc
@@ -0,0 +1 @@
+Automatically retry buildkite builds (max twice) when an agent is lost.