Update submodule OmniBLE to e15b187

- Prevent hang following restart if Pod Setup was interrupted

git submodule:
 a92e9752994e7b143cdb007d3c7bcba0c0cc9214 CGMBLEKit (v3.1-166-ga92e975)
 eba7d98b9a7995f50209f14f20cc1ac779b330ea G7SensorKit (heads/main)
 c01eba63e94e9f6f2841a8835680c4e39c61b18d LibreTransmitter (heads/main)
 2f535b3ca46825e82e0dd1b5ef9daccd53a3f0ca LoopKit (v3.0-1039-g2f535b3)
 aa82a184e8243d30dc3b488ae17fd31602a3bd80 MinimedKit (heads/main-5-gaa82a18)
 e15b18796a6ac0a08851b4ca2924cec669d669c5 OmniBLE (heads/dev)
 30428b78809bf816b12b01ca2a05eb843ab46c99 OmniKit (heads/main)
 a0e419da314d0ad42b41ccb04af73cd1fbf41257 RileyLinkKit (heads/dev)
 a2ccad72a55600c28549ab86ab1964c0d6558868 TidepoolService (heads/dev_rc)
 21d8657d727f26df76342188e580022bf4884714 dexcom-share-client-swift (v0.4.1-156-g21d8657)

Co-authored-by: Marion Barker <marionbarker@earthlink.net>

OmniBLE

@@ -1 +1 @@
-Subproject commit 130c6d58950bb7e52b704297eb0b9fe1d0a7f8c6
+Subproject commit e15b18796a6ac0a08851b4ca2924cec669d669c5