SDL: Work around the lack of clock() on PS Vita

SDL Commits
1 
From 0a93ac129475ab3ce11af95969f767d60e98233a Mon Sep 17 00:00:00 2001
From: Cameron Cawley <[EMAIL REDACTED]>
Date: Sun, 8 May 2022 18:06:47 +0100
Subject: [PATCH] Work around the lack of clock() on PS Vita

---
 src/test/SDL_test_harness.c | 2 +-
 src/test/SDL_test_random.c  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/test/SDL_test_harness.c b/src/test/SDL_test_harness.c
index ec67d997786..2e94f6c28ce 100644
--- a/src/test/SDL_test_harness.c
+++ b/src/test/SDL_test_harness.c
@@ -349,7 +349,7 @@ static void SDLTest_LogTestSuiteSummary(SDLTest_TestSuiteReference *testSuites)
 /* Gets a timer value in seconds */
 static float GetClock()
 {
-    float currentClock = clock() / (float) CLOCKS_PER_SEC;
+    float currentClock = SDL_GetPerformanceCounter() / (float) SDL_GetPerformanceFrequency();
     return currentClock;
 }
 
diff --git a/src/test/SDL_test_random.c b/src/test/SDL_test_random.c
index c52e050bba8..b2babf18c8c 100644
--- a/src/test/SDL_test_random.c
+++ b/src/test/SDL_test_random.c
@@ -70,7 +70,7 @@ void SDLTest_RandomInitTime(SDLTest_RandomContext * rndContext)
 
   srand((unsigned int)time(NULL));
   a=rand();
-  srand((unsigned int)clock());
+  srand((unsigned int)SDL_GetPerformanceCounter());
   b=rand();
   SDLTest_RandomInit(rndContext, a, b);
 }