Bumping gaia.json for 8 gaia revision(s) a=gaia-bump

Truncated some number of revisions since the previous bump.

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https://hg.mozilla.org/integration/gaia-central/rev/104c2987c21a
Author: BavarianTomcat <tomcat@mozilla.com>
Desc: Revert "Bug 1010088 - Use STAGE_DIR consistently on build process" for build bustages

This reverts commit 9c4b99d180313c243b32849c632a1e597a56e16c.

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https://hg.mozilla.org/integration/gaia-central/rev/e69c9197e35e
Author: Min-Zhong "John" Lu <mnjul@users.noreply.github.com>
Desc: Merge pull request #19184 from mnjul/bug_987039_bluetooth_xfer_unit_test_coverage

Bug 987039 - apps/system/test/unit/bluetooth_transfer_test.js covers only 25% of the code. r=ianliu

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https://hg.mozilla.org/integration/gaia-central/rev/856b4859f9b6
Author: John Lu [:mnjul] <jlu@mozilla.com>
Desc: Bug 987039 - apps/system/test/unit/bluetooth_transfer_test.js covers only 25% of the code. r=ianliu

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https://hg.mozilla.org/integration/gaia-central/rev/8851a70e2b0e
Author: Min-Zhong "John" Lu <mnjul@users.noreply.github.com>
Desc: Merge pull request #19623 from mnjul/bug_1000748_remove_multilocale_help_in_readme

Bug 1000748 - remove multilocale-clean help in README since it was removed the makefile [r=yuren]

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https://hg.mozilla.org/integration/gaia-central/rev/0c7e21376e21
Author: John Lu [:mnjul] <jlu@mozilla.com>
Desc: Bug 1000748 - remove multilocale-clean help in README since it was removed the makefile

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https://hg.mozilla.org/integration/gaia-central/rev/4878e2ce6a2b
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1014501 - Follow-up, fix @import syntax error r=me

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https://hg.mozilla.org/integration/gaia-central/rev/08081dbfe51e
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #19614 from KevinGrandon/bug_1014501_component_import_polyfill_2

Bug 1014501 - [WebComponents] style import polyfill

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https://hg.mozilla.org/integration/gaia-central/rev/76a31e1eb9d7
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1014501 - [WebComponents] style import polyfill r=yor

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "46b331b7fa8272fdb2535910e0b5aec91325b2f2", 
+    "revision": "104c2987c21a4a862fb6ad63952f994ce3195f68", 
     "repo_path": "/integration/gaia-central"
 }