Clarify build target name in CI.

.gitlab-ci.yml

@@ -32,7 +32,7 @@ format:
     - go vet $(go list ./... | grep -v /vendor/)
     - go test -race $(go list ./... | grep -v /vendor/)
 
-compile_amd64:
+compile_linux-amd64:
   stage: build
   only:
     - tags
@@ -42,7 +42,7 @@ compile_amd64:
     paths:
       - go-sendxmpp
 
-compile_arm64:
+compile_linux-arm64:
   stage: build
   only:
     - tags
@@ -52,7 +52,7 @@ compile_arm64:
     paths:
       - go-sendxmpp
 
-compile_386:
+compile_linux-386:
   stage: build
   only:
     - tags
@@ -62,7 +62,7 @@ compile_386:
     paths:
       - go-sendxmpp
 
-compile_arm:
+compile_linux-arm:
   stage: build
   only:
     - tags