Bug 1719426 - Build glibc_2.27-3ubuntu1.2 ourselves. r=taskgraph-reviewers,bhearsum

As written in 00c93ac66282, relying on the 2.27-3ubuntu1.2 package being
available is a timebomb. We can however get the older sources from
launchpad, and build them ourselves.

Differential Revision: https://phabricator.services.mozilla.com/D119258

build/debian-packages/ubuntu-glibc.diff

@@ -0,0 +1,13 @@
+diff -Nru glibc-2.27/debian/changelog glibc-2.27/debian/changelog
+--- glibc-2.27/debian/changelog        2020-06-05 02:25:26.000000000 +0900
++++ glibc-2.27/debian/changelog        2021-06-25 17:54:19.000000000 +0900
+@@ -1,3 +1,9 @@
++glibc (2.27-3ubuntu1.2.ub18moz1) bionic; urgency=medium
++
++  * Mozilla backport for bionic.
++
++ -- Mike Hommey <mhommey@mozilla.com>  Fri, 25 Jun 2021 17:54:19 +0900
++
+ glibc (2.27-3ubuntu1.2) bionic-security; urgency=medium
+ 
+   * SECURITY UPDATE: integer overflow in realpath

taskcluster/ci/config.yml

@@ -116,6 +116,7 @@ treeherder:
         'Deb8-32': 'Packages for Debian 8 32-bits'
         'Deb9': 'Packages for Debian 9'
         'Deb10': 'Packages for Debian 10'
+        'Ub18': 'Packages for Ubuntu 18.04'
         'I': 'Docker Image Builds'
         'TL': 'Toolchain builds for Linux 64-bits'
         'TL32': 'Toolchain builds for Linux 32-bits'

taskcluster/ci/packages/kind.yml

@@ -22,3 +22,4 @@ job-defaults:
 
 jobs-from:
     - debian.yml
+    - ubuntu.yml

taskcluster/ci/packages/ubuntu.yml

@@ -0,0 +1,29 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+---
+job-defaults:
+    run:
+        using: ubuntu-package
+        dist: bionic
+
+ub18-libc6:
+    description: "Older version of glibc in Ubuntu 18.04 that doesn't cause bug 1678451"
+    treeherder:
+        symbol: Ub18(libc6)
+    run:
+        dsc:
+            url: https://launchpad.net/ubuntu/+archive/primary/+sourcefiles/glibc/2.27-3ubuntu1.2/glibc_2.27-3ubuntu1.2.dsc
+            sha256: 2ac325cce2251c710dd041f4725925cdbccefba6f6f0f0d95a2a5a09e2050c2e
+        patch: ubuntu-glibc.diff
+
+ub18-32-libc6:
+    description: "Older version of glibc in Ubuntu 18.04 that doesn't cause bug 1678451"
+    treeherder:
+        symbol: Ub18(libc6-32)
+    run:
+        dsc:
+            url: https://launchpad.net/ubuntu/+archive/primary/+sourcefiles/glibc/2.27-3ubuntu1.2/glibc_2.27-3ubuntu1.2.dsc
+            sha256: 2ac325cce2251c710dd041f4725925cdbccefba6f6f0f0d95a2a5a09e2050c2e
+        arch: i386
+        patch: ubuntu-glibc.diff