Add official Swift 5.2 releases for other Linux distros to CI

.gitlab/ci/amazonlinux-2.yml

@@ -4,3 +4,7 @@ swift trunk:
   extends: .unit-test
   image: swiftlang/swift:nightly-master-amazonlinux2
   allow_failure: true
+
+swift 5.2:
+  extends: .unit-test
+  image: swift:5.2-amazonlinux2

.gitlab/ci/centos-8.yml

@@ -4,3 +4,7 @@ swift trunk:
   extends: .unit-test
   image: swiftlang/swift:nightly-master-centos8
   allow_failure: true
+
+swift 5.2:
+  extends: .unit-test
+  image: swift:5.2-centos8

.gitlab/ci/ubuntu-bionic.yml

@@ -1,25 +1,25 @@
 include: '/.gitlab/ci/test-template.yml'
 
-swift 5.0:
+swift trunk:
   extends: .unit-test
-  image: swift:5.0-bionic
-  variables:
-    SANITIZER_ARG: ''
-
-swift 5.1:
-  extends: .unit-test
-  image: swift:5.1-bionic
-
-swift 5.2:
-  extends: .unit-test
-  image: swift:5.2-bionic
+  image: swiftlang/swift:nightly-master-bionic
+  allow_failure: true
 
 swift 5.3:
   extends: .unit-test
   image: swiftlang/swift:nightly-5.3-bionic
   allow_failure: true
 
-swift trunk:
+swift 5.2:
   extends: .unit-test
-  image: swiftlang/swift:nightly-master-bionic
-  allow_failure: true
+  image: swift:5.2-bionic
+
+swift 5.1:
+  extends: .unit-test
+  image: swift:5.1-bionic
+
+swift 5.0:
+  extends: .unit-test
+  image: swift:5.0-bionic
+  variables:
+    SANITIZER_ARG: ''

.gitlab/ci/ubuntu-focal.yml

@@ -4,3 +4,7 @@ swift trunk:
   extends: .unit-test
   image: swiftlang/swift:nightly-master-focal
   allow_failure: true
+
+swift 5.2:
+  extends: .unit-test
+  image: swift:5.2-focal

.gitlab/ci/ubuntu-xenial.yml

@@ -1,24 +1,24 @@
 include: '/.gitlab/ci/test-template.yml'
 
+swift trunk:
+  extends: .unit-test
+  image: swiftlang/swift:nightly-master-xenial
+  allow_failure: true
+
+swift 5.3:
+  extends: .unit-test
+  image: swiftlang/swift:nightly-5.3-xenial
+
+swift 5.2:
+  extends: .unit-test
+  image: swift:5.2-xenial
+
+swift 5.1:
+  extends: .unit-test
+  image: swift:5.1-xenial
+
 swift 5.0:
   extends: .unit-test
   image: swift:5.0-xenial
   variables:
     SANITIZER_ARG: ''
-
-swift 5.1:
-  extends: .unit-test
-  image: swift:5.1-xenial
-
-swift 5.2:
-  extends: .unit-test
-  image: swift:5.2-xenial
-
-swift 5.3:
-  extends: .unit-test
-  image: swiftlang/swift:nightly-5.3-xenial
-
-swift trunk:
-  extends: .unit-test
-  image: swiftlang/swift:nightly-master-xenial
-  allow_failure: true