Rename SDL semaphore and condition variable functions to match SDL 3.0 naming convention

Fixes https://github.com/libsdl-org/SDL/issues/7642

src/thread/ngage/SDL_syssem.cpp

@@ -101,7 +101,7 @@ void SDL_DestroySemaphore(SDL_sem *sem)
     }
 }
 
-int SDL_SemWaitTimeoutNS(SDL_sem *sem, Sint64 timeoutNS)
+int SDL_WaitSemaphoreTimeoutNS(SDL_sem *sem, Sint64 timeoutNS)
 {
     if (sem == NULL) {
         return SDL_InvalidParamError("sem");
@@ -140,7 +140,7 @@ int SDL_SemWaitTimeoutNS(SDL_sem *sem, Sint64 timeoutNS)
 }
 
 Uint32
-SDL_SemValue(SDL_sem *sem)
+SDL_GetSemaphoreValue(SDL_sem *sem)
 {
     if (sem == NULL) {
         SDL_InvalidParamError("sem");
@@ -149,7 +149,7 @@ SDL_SemValue(SDL_sem *sem)
     return sem->count;
 }
 
-int SDL_SemPost(SDL_sem *sem)
+int SDL_PostSemaphore(SDL_sem *sem)
 {
     if (sem == NULL) {
         return SDL_InvalidParamError("sem");