Bug 1323773 - Update android builders to rust 1.15.0-beta.2. r=mshal

Fix code generation for armv7 devices without neon by switching
official builds to the 1.15 beta rust compiler. This fixes the
target generation (and standard library image) to not assume
neon is available, per Google's NDK guidelines.

We expect to update this to 1.15.0 stable before release.

MozReview-Commit-ID: HWJLLGJaUDY

--HG--
extra : rebase_source : 53f00f34f40bb2adb07de27e05019ef0159f5ec8

mobile/android/config/tooltool-manifests/android-gradle-dependencies/releng.manifest

@@ -15,9 +15,9 @@
 "unpack": true
 },
 {
-"version": "rustc 1.14.0 (e8a012324 2016-12-16) repack",
-"size": 105698380,
-"digest": "e4ee593a08ee63bf0c350dab040a769acd1c028201086707bce50b953653d3ee072a7b29667cb9e77c5c4fa0fd5aa5ed90d5f022339d8a136e705363a42863e2",
+"version": "rustc 1.15.0-beta.2 (519656798 2016-12-30) repack",
+"size": 110451636,
+"digest": "a7b34249eb4981b3b553b319515d3f333245cc0e38a631e8d0de35e130b001270783c0dd6fb58f0bf7900e3694be49453c8c23e6589996123ebddc7308d3039d",
 "algorithm": "sha512",
 "filename": "rustc.tar.xz",
 "unpack": true

mobile/android/config/tooltool-manifests/android-x86/releng.manifest

@@ -48,9 +48,9 @@
 "unpack": true
 },
 {
-"version": "rustc 1.14.0 (e8a012324 2016-12-16) repack",
-"size": 105698380,
-"digest": "e4ee593a08ee63bf0c350dab040a769acd1c028201086707bce50b953653d3ee072a7b29667cb9e77c5c4fa0fd5aa5ed90d5f022339d8a136e705363a42863e2",
+"version": "rustc 1.15.0-beta.2 (519656798 2016-12-30) repack",
+"size": 110451636,
+"digest": "a7b34249eb4981b3b553b319515d3f333245cc0e38a631e8d0de35e130b001270783c0dd6fb58f0bf7900e3694be49453c8c23e6589996123ebddc7308d3039d",
 "algorithm": "sha512",
 "filename": "rustc.tar.xz",
 "unpack": true

mobile/android/config/tooltool-manifests/android/releng.manifest

@@ -73,9 +73,9 @@
 "size": 51753660
 },
 {
-"version": "rustc 1.14.0 (e8a012324 2016-12-16) repack",
-"size": 105698380,
-"digest": "e4ee593a08ee63bf0c350dab040a769acd1c028201086707bce50b953653d3ee072a7b29667cb9e77c5c4fa0fd5aa5ed90d5f022339d8a136e705363a42863e2",
+"version": "rustc 1.15.0-beta.2 (519656798 2016-12-30) repack",
+"size": 110451636,
+"digest": "a7b34249eb4981b3b553b319515d3f333245cc0e38a631e8d0de35e130b001270783c0dd6fb58f0bf7900e3694be49453c8c23e6589996123ebddc7308d3039d",
 "algorithm": "sha512",
 "filename": "rustc.tar.xz",
 "unpack": true