Change error message when no available releases are found

Author: alessio-perugini

arduino/cores/packagemanager/download.go

@@ -89,7 +89,7 @@ func (pme *Explorer) FindPlatformReleaseDependencies(item *PlatformReference) (*
 	} else {
 		release = platform.GetLatestCompatibleRelease()
 		if release == nil {
-			return nil, nil, fmt.Errorf(tr("platform %s has no available releases"), platform.String())
+			return nil, nil, fmt.Errorf(tr("platform %s has no available releases for your OS"), platform.String())
 		}
 	}
 

internal/integrationtest/core/core_test.go

@@ -1142,5 +1142,5 @@ func TestCoreHavingIncompatibleDepTools(t *testing.T) {
 	// When no compatible version are found return error
 	_, stderr, err = cli.Run("core", "install", "incompatible_vendor:avr", additionalURLs)
 	require.Error(t, err)
-	require.Contains(t, string(stderr), "has no available releases")
+	require.Contains(t, string(stderr), "has no available releases for your OS")
 }