Use default user's cache dir instead of tmp for build cache

Author: cmaglie

internal/cli/configuration/configuration.go

@@ -103,7 +103,14 @@ func getDefaultUserDir() string {
 
 // getDefaultBuildCacheDir returns the full path to the default build cache folder
 func getDefaultBuildCacheDir() string {
-	return paths.TempDir().Join("arduino").String()
+	var cacheDir *paths.Path
+	if p, err := os.UserCacheDir(); err == nil {
+		cacheDir = paths.New(p)
+	} else {
+		// fallback to /tmp
+		cacheDir = paths.TempDir()
+	}
+	return cacheDir.Join("arduino").String()
 }
 
 // FindConfigFlagsInArgsOrFallbackOnEnv returns the config file path using the