[kernel]: update sonic linux kernel submodule

* 70fdaa2 2018-06-30 | Support Delta DPS1900 (#49) (HEAD -> stretch, origin/stretch) [Deni]
* 77895c5 2018-04-17 | Add kexec reboot string (#46) [Joe LeVeque]
This commit is contained in:
Guohan Lu 2018-07-30 22:55:13 +00:00
parent 46b0847339
commit a32b7412c3

@ -1 +1 @@
Subproject commit a21a592baf4b189591f63fe7930f7d889bccd57a
Subproject commit 70fdaa224c1373682be871c084bf0f590bfafd8f