CircleCI: add missing coreboot git directories to caching

Add this to linuxboot#1526 since coreboot related buildstack files missing should not prevent future builds once a single successful build is supposed to create a cache containing those files having difficulties being downloaded
Signed-off-by: Thierry Laurion <insurgo@riseup.net>

Author: tlaurion

.circleci/config.yml

@@ -194,8 +194,9 @@ jobs:
             - build/x86/coreboot-4.15
             - build/x86/coreboot-4.17
             - build/x86/coreboot-4.19
-            - build/x86/coreboot-git
-            - build/ppc64/coreboot-git
+            - build/x86/coreboot-nitrokey
+            - build/x86/coreboot-purism
+            - build/ppc64/coreboot-talos_2
       - save_cache:
           #Generate cache for the exact same modules definitions if hash is not previously existing
           key: heads-modules-and-patches-{{ checksum "./tmpDir/all_modules_and_patches.sha256sums" }}{{ .Environment.CACHE_VERSION }}