Merge #15528: contrib: Bump gitian descriptors for 0.19

fa58a2e335 contrib: Bump gitian descriptors for 0.19 (MarcoFalke)

Pull request description:

  Bump the cache directory (as in 263b3777e7)

Tree-SHA512: 2f9a4f8c14c3c6cef30bcdfed638486c6b957068b1e2380cbde1719c9bf8b53bcaff35833272a879af5b031e3ea0a32cc16f78cc7e4d7399037de89132311c5b

contrib/gitian-descriptors/gitian-linux.yml

@@ -1,5 +1,5 @@
 ---
-name: "bitcoin-linux-0.18"
+name: "bitcoin-core-linux-0.19"
 enable_cache: true
 suites:
 - "bionic"

contrib/gitian-descriptors/gitian-osx.yml

@@ -1,5 +1,5 @@
 ---
-name: "bitcoin-osx-0.18"
+name: "bitcoin-core-osx-0.19"
 enable_cache: true
 suites:
 - "bionic"

contrib/gitian-descriptors/gitian-win.yml

@@ -1,5 +1,5 @@
 ---
-name: "bitcoin-win-0.18"
+name: "bitcoin-core-win-0.19"
 enable_cache: true
 suites:
 - "bionic"