tsan: fix build breakage due to AppMemBeg

[dvyukov]

Summary

AppMemBeg was renamed to LoAppMemBeg in 3830c93478
("tsan: rename kAppMemBeg to kLoAppMemBeg").
Rename remaining uses of the old name in tsan_platform_mac.cpp.

compiler-rt/lib/tsan/rtl/tsan_platform_mac.cpp

#if !SANITIZER_GO
   uptr low_res, low_dirty;
   uptr high_res, high_dirty;
   uptr heap_res, heap_dirty;
   RegionMemUsage(LoAppMemBeg(), LoAppMemEnd(), &low_res, &low_dirty);
   RegionMemUsage(HiAppMemBeg(), HiAppMemEnd(), &high_res, &high_dirty);
   RegionMemUsage(HeapMemBeg(), HeapMemEnd(), &heap_res, &heap_dirty);
 #else  // !SANITIZER_GO
   uptr app_res, app_dirty;
-  RegionMemUsage(AppMemBeg(), AppMemEnd(), &app_res, &app_dirty);
+  RegionMemUsage(LoAppMemBeg(), LoAppMemEnd(), &app_res, &app_dirty);
 #endif
 
   StackDepotStats *stacks = StackDepotGetStats();
   internal_snprintf(buf, buf_size,
     "shadow   (0x%016zx-0x%016zx): resident %zd kB, dirty %zd kB\n"
     "meta     (0x%016zx-0x%016zx): resident %zd kB, dirty %zd kB\n"
     "traces   (0x%016zx-0x%016zx): resident %zd kB, dirty %zd kB\n"
 #if !SANITIZER_GO
     "low app  (0x%016zx-0x%016zx): resident %zd kB, dirty %zd kB\n"
     "high app (0x%016zx-0x%016zx): resident %zd kB, dirty %zd kB\n"
     "heap     (0x%016zx-0x%016zx): resident %zd kB, dirty %zd kB\n"
 #else  // !SANITIZER_GO
       "app      (0x%016zx-0x%016zx): resident %zd kB, dirty %zd kB\n"
 #endif
     "stacks: %zd unique IDs, %zd kB allocated\n"
     "threads: %zd total, %zd live\n"
     "------------------------------\n",
     ShadowBeg(), ShadowEnd(), shadow_res / 1024, shadow_dirty / 1024,
     MetaShadowBeg(), MetaShadowEnd(), meta_res / 1024, meta_dirty / 1024,
     TraceMemBeg(), TraceMemEnd(), trace_res / 1024, trace_dirty / 1024,
 #if !SANITIZER_GO
     LoAppMemBeg(), LoAppMemEnd(), low_res / 1024, low_dirty / 1024,
     HiAppMemBeg(), HiAppMemEnd(), high_res / 1024, high_dirty / 1024,
     HeapMemBeg(), HeapMemEnd(), heap_res / 1024, heap_dirty / 1024,
 #else  // !SANITIZER_GO
-    AppMemBeg(), AppMemEnd(), app_res / 1024, app_dirty / 1024,
+      LoAppMemBeg(), LoAppMemEnd(), app_res / 1024, app_dirty / 1024,
 #endif
     stacks->n_uniq_ids, stacks->allocated / 1024,
     nthread, nlive);
 }
 
 #if !SANITIZER_GO
 void InitializeShadowMemoryPlatform() { }