buildDubPackage: fix flag arrays not being expanded correctly (#486535)

pkgs/build-support/dlang/builddubpackage/hooks/dub-build-hook.sh

@@ -2,7 +2,14 @@ dubBuildHook() {
     runHook preBuild
     echo "Executing dubBuildHook"
 
-    dub build --skip-registry=all --build="${dubBuildType-"release"}" "${dubBuildFlags[@]}" "${dubFlags[@]}"
+    local flagsArray=(
+        --skip-registry=all
+        "--build=${dubBuildType-release}"
+    )
+    concatTo flagsArray dubBuildFlags dubFlags
+
+    echoCmd 'dubBuildHook flags' "${flagsArray[@]}"
+    dub build "${flagsArray[@]}"
 
     echo "Finished dubBuildHook"
     runHook postBuild

pkgs/build-support/dlang/builddubpackage/hooks/dub-check-hook.sh

@@ -2,7 +2,13 @@ dubCheckHook() {
     runHook preCheck
     echo "Executing dubCheckHook"
 
-    dub test --skip-registry=all "${dubTestFlags[@]}" "${dubFlags[@]}"
+    local flagsArray=(
+        --skip-registry=all
+    )
+    concatTo flagsArray dubTestFlags dubFlags
+
+    echoCmd 'dubCheckHook flags' "${flagsArray[@]}"
+    dub test "${flagsArray[@]}"
 
     echo "Finished dubCheckHook"
     runHook postCheck