Bumping gaia.json for 6 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/a5acce851893
Author: Martijn <martijn.martijn@gmail.com>
Desc: Merge pull request #32858 from mwargers/1219843

Bug 1219843 - Remove workaround for bug 1216394 in test_browser_clear_browsing_history.py

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https://hg.mozilla.org/integration/gaia-central/rev/7f03c90c40e2
Author: Martijn Wargers <mwargers@mozilla.com>
Desc: Bug 1219843 - Remove workaround for bug 1216394 in test_browser_clear_browsing_history.py

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https://hg.mozilla.org/integration/gaia-central/rev/23bb280000f9
Author: Martijn <martijn.martijn@gmail.com>
Desc: Merge pull request #32876 from mwargers/1219955

Bug 1219955 - test_fmradio_add_remove_from_favorites.py failure - UnicodeEncodeError

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https://hg.mozilla.org/integration/gaia-central/rev/b861549ac8a1
Author: Martijn Wargers <mwargers@mozilla.com>
Desc: Bug 1219955 - test_fmradio_add_remove_from_favorites.py failure - UnicodeEncodeError

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https://hg.mozilla.org/integration/gaia-central/rev/eea5081854b2
Author: Martijn <martijn.martijn@gmail.com>
Desc: Merge pull request #32874 from mwargers/1219971

Bug 1219971 - Failure in test_cost_control_reset_wifi.py, because of launch directly after a kill

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https://hg.mozilla.org/integration/gaia-central/rev/d54589dbbde4
Author: Martijn Wargers <mwargers@mozilla.com>
Desc: Bug 1219971 - Failure in test_cost_control_reset_wifi.py, because of launch directly after a kill

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "627ecb1a8f38d828a2128f69e0b122a6c05ab25c", 
+        "git_revision": "7954ff0cbd794a35499a1082bed273598f82ee6f", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "5f2f8e80254e256d3fcbdde652524e51efda30e6", 
+    "revision": "a5acce8518931374a2a78442726dfe6a724a3962", 
     "repo_path": "integration/gaia-central"
 }