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

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https://hg.mozilla.org/integration/gaia-central/rev/c933f596172d
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #24192 from zacc/bug_1068670_pt2

Bug 1068670 - Followup to original patch, send correct job_type_name to ...

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https://hg.mozilla.org/integration/gaia-central/rev/dbe3202d9b36
Author: Zac <zcampbell@mozilla.com>
Desc: Bug 1068670 - Followup to original patch, send correct job_type_name to treeherder r=mdoglio

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https://hg.mozilla.org/integration/gaia-central/rev/80253ebafb27
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Merge pull request #24185 from Rik/dtmf-typo-1065147

Bug 1065147 - DTMF volume is reduced significantly and cannot be increas... r=drs,etienne

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https://hg.mozilla.org/integration/gaia-central/rev/ca4d63833cec
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Bug 1065147 - DTMF volume is reduced significantly and cannot be increased after a call

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "7e89bbbc62c3d969ff86cb6a202bee0883bdb88d", 
+    "revision": "c933f596172d0ecb3bb140a431989a3382682a51", 
     "repo_path": "/integration/gaia-central"
 }