Merge #680: Fix gitian descriptor major version for yml

ce2a5e7 Fix gitian descriptor major version for yml (Gregory Sanders)

Pull request description:

  Makes the gitian output wrong otherwise:

  ```
  Generating report
  ec40c90d48ea38bb63cf1d36a0695810412ac3676e3359ad62e8ccf5273a0fcf  elements-0.17.0-aarch64-linux-gnu-debug.tar.gz
  ...
  613418e96782c9e7cd5b9427e851a96575b1252fc14a0decad63d9b29bcd515a  src/elements-0.17.0.tar.gz
  ba84ba37eb386b51492247edafa5f23c921cb81ca1a9eea06273d6aadc885f36  elements-linux-0.18-res.yml
  ```

Tree-SHA512: 2e56261fd132d6bf2e9b6d98df0c513ff3657493cbdbf07c66c7e7280721f0f374d4bbb20fc12bcffd5d0a4d738420298a945049c40902ed636835efa78bdbf7

Author: stevenroose

contrib/gitian-descriptors/gitian-linux.yml

@@ -1,5 +1,5 @@
 ---
-name: "elements-linux-0.18"
+name: "elements-linux-0.17"
 enable_cache: true
 suites:
 - "bionic"

contrib/gitian-descriptors/gitian-osx.yml

@@ -1,5 +1,5 @@
 ---
-name: "elements-osx-0.18"
+name: "elements-osx-0.17"
 enable_cache: true
 suites:
 - "bionic"

contrib/gitian-descriptors/gitian-win.yml

@@ -1,5 +1,5 @@
 ---
-name: "elements-win-0.18"
+name: "elements-win-0.17"
 enable_cache: true
 suites:
 - "bionic"