Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/355b2a3659ab
Author: Sam Foster <sam@sam-i-am.com>
Desc: Merge pull request #32459 from sfoster/late-customization-skip-bug-1214990

Bug 1214990 - Allow settings to override; skip step when 0 apps. r=arcturus

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https://hg.mozilla.org/integration/gaia-central/rev/d3951922f302
Author: Sam Foster <sfoster@mozilla.com>
Desc: Bug 1214990 - Allow settings to override; skip step when 0 apps. r=arcturus

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https://hg.mozilla.org/integration/gaia-central/rev/61b084080319
Author: Fernando Jiménez Moreno <ferjmoreno@gmail.com>
Desc: Merge pull request #32464 from ferjm/bug1214280.sdcard.ftu

Bug 1214280 - Users are unable to import contacts from memory card in…

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https://hg.mozilla.org/integration/gaia-central/rev/eaee36111f9e
Author: Fernando Jiménez Moreno <ferjmoreno@gmail.com>
Desc: Bug 1214280 - Users are unable to import contacts from memory card in FTU/FTE. r=francisco

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "bda95a30e990b4f5115fbaa6742d046285aedce7", 
+        "git_revision": "4c8646bb5642276bfa0eb7f8da7aeba4ce871f34", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "3cd2228544740917aa34b28ada66bab03d03c9f9", 
+    "revision": "355b2a3659ab41036ebbe559868ffb293eea732a", 
     "repo_path": "integration/gaia-central"
 }