SDL: Don't run the stdio automated tests if libc isn't available

SDL Commits
1 
From aaec244cfd460c0d8c910f503f3fd8e0b4b8af82 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Wed, 10 Aug 2022 09:04:17 -0700
Subject: [PATCH] Don't run the stdio automated tests if libc isn't available

---
 test/testautomation_rwops.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/test/testautomation_rwops.c b/test/testautomation_rwops.c
index a7d3c32725a..44e0086bbac 100644
--- a/test/testautomation_rwops.c
+++ b/test/testautomation_rwops.c
@@ -393,6 +393,7 @@ rwops_testFileWrite(void)
 int
 rwops_testFPRead(void)
 {
+#ifdef HAVE_LIBC
    FILE *fp;
    SDL_RWops *rw;
    int result;
@@ -428,6 +429,8 @@ rwops_testFPRead(void)
    SDLTest_AssertPass("Call to SDL_RWclose() succeeded");
    SDLTest_AssertCheck(result == 0, "Verify result value is 0; got: %d", result);
 
+#endif /* HAVE_LIBC */
+
    return TEST_COMPLETED;
 }
 
@@ -443,6 +446,7 @@ rwops_testFPRead(void)
 int
 rwops_testFPWrite(void)
 {
+#ifdef HAVE_LIBC
    FILE *fp;
    SDL_RWops *rw;
    int result;
@@ -478,6 +482,8 @@ rwops_testFPWrite(void)
    SDLTest_AssertPass("Call to SDL_RWclose() succeeded");
    SDLTest_AssertCheck(result == 0, "Verify result value is 0; got: %d", result);
 
+#endif /* HAVE_LIBC */
+
    return TEST_COMPLETED;
 }