SDL: N3DS: Prefix timer sources with `N3DS_`.

SDL Commits
1 
From 27557b62b6940f3280de323bb0fb23dd8c3498f6 Mon Sep 17 00:00:00 2001
From: Pierre Wendling <[EMAIL REDACTED]>
Date: Tue, 20 Sep 2022 19:53:45 -0400
Subject: [PATCH] N3DS: Prefix timer sources with `N3DS_`.

---
 CMakeLists.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 48cbb6174f41..dd131af5cd46 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2778,8 +2778,8 @@ elseif(N3DS)
 
   if(SDL_TIMERS)
     set(SDL_TIMER_N3DS 1)
-    file(GLOB TIMER_SOURCES ${SDL2_SOURCE_DIR}/src/timer/n3ds/*.c)
-    list(APPEND SOURCE_FILES ${TIMER_SOURCES})
+    file(GLOB N3DS_TIMER_SOURCES ${SDL2_SOURCE_DIR}/src/timer/n3ds/*.c)
+    list(APPEND SOURCE_FILES ${N3DS_TIMER_SOURCES})
     set(HAVE_SDL_TIMERS TRUE)
   endif()