Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/30bc42a5f94a
Author: tamarahills <thills@mozilla.com>
Desc: Merge pull request #31703 from tamarahills/bugfix/1176986-persist-metrics-after-reboot

Bug 1176986 - Make advanced telemetry metrics persistent in between r…

========

https://hg.mozilla.org/integration/gaia-central/rev/8c70881106fc
Author: Tamara Hills <thills@mozilla.com>
Desc: Bug 1176986 - Make advanced telemetry metrics persistent in between reboots.

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "29991414eb94b6baa1ec2e63fdb4f6dfae05fb01", 
+        "git_revision": "e42f7e9937b62f84d2baef547f5bd08e1a6ac44b", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "7093f7d19d1df254cb9445417e47c3557103f073", 
+    "revision": "30bc42a5f94af00aa792b4c116428e2fb2b9c0f5", 
     "repo_path": "integration/gaia-central"
 }