[automerger skipped] [DO NOT MERGE] Add newline to each generated bash script...

[automerger skipped] [DO NOT MERGE] Add newline to each generated bash script in rbe_test.go. am: b258d936 am: 7abebafe -s ours am: fba93eaf -s ours

am skip reason: Change-Id I425fa5f428733b6569c3fcdaa312023f9761d020 with SHA-1 70ca506d is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/build/soong/+/12598126

Change-Id: I9edefc45445ea25fdd6b8e54bca1f7a9d5e49b93