[PATCH for-4.15] automation: Fix the Alpine clang builds to use clang

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

Looks like a copy&paste error.

Fixes: f6e1d8515d7 ("automation: add alpine linux x86 build jobs")
Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
CC: Doug Goldstein <cardoe@xxxxxxxxxx>
CC: Ian Jackson <iwj@xxxxxxxxxxxxxx>
CC: Stefano Stabellini <sstabellini@xxxxxxxxxx>
---
 automation/gitlab-ci/build.yaml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/automation/gitlab-ci/build.yaml b/automation/gitlab-ci/build.yaml
index d00b8a5123..23ab81d892 100644
--- a/automation/gitlab-ci/build.yaml
+++ b/automation/gitlab-ci/build.yaml
@@ -443,13 +443,13 @@ alpine-3.12-gcc-debug:
   allow_failure: true
 
 alpine-3.12-clang:
-  extends: .gcc-x86-64-build
+  extends: .clang-x86-64-build
   variables:
     CONTAINER: alpine:3.12
   allow_failure: true
 
 alpine-3.12-clang-debug:
-  extends: .gcc-x86-64-build-debug
+  extends: .clang-x86-64-build-debug
   variables:
     CONTAINER: alpine:3.12
   allow_failure: true
-- 
2.11.0