test: Clear PKG_CONFIG_ALLOW_CROSS and FOO_NO_PKG_CONFIG environment variables

Author: SuperHeron

tests/test.rs

@@ -12,7 +12,9 @@ static LOCK: StaticMutex = MUTEX_INIT;
 fn reset() {
     for (k, _) in env::vars() {
         if k.contains("DYNAMIC") ||
-           k.contains("STATIC") {
+           k.contains("STATIC") ||
+           k.contains("PKG_CONFIG_ALLOW_CROSS") ||
+           k.contains("FOO_NO_PKG_CONFIG") {
             env::remove_var(&k);
         }
     }