Rebase private OTA libs on 2.7

mos.yml

@@ -1,6 +1,6 @@
 author: Pim van Pelt <pim@ipng.nl>
 description: A Mongoose-OS Light Switch
-version: 1.1
+version: 1.2
 platform: esp8266
 
 libs_version: ${mos.version}
@@ -59,8 +59,9 @@ libs:
   - origin: https://github.com/mongoose-os-libs/rpc-mqtt
   - origin: https://github.com/mongoose-os-libs/mqtt
   - origin: https://github.com/mongoose-os-libs/dht
-    version: latest
   - origin: /home/pim/src/prometheus-sensors
+  - origin: libs/ota-common
+  - origin: libs/ota-http-client
   - origin: libs/rpc-service-ota
 
 # Used by the mos tool to catch mos binaries incompatible with this file format