[compiler-rt] [scudo] Make comment compatible with gcc (PR #106137)

[Caslyn Tonelli via llvm-commits]

================
@@ -426,7 +426,7 @@ class MapAllocatorCache {
     //  The difference between the retrieved memory chunk and the request
     //  size is at most MaxAllowedFragmentedPages
     //
-    //  / MaxAllowedFragmentedPages * PageSize \
+    //  / MaxAllowedFragmentedPages * PageSize \.
----------------
Caslyn wrote:

GTK, done.

https://github.com/llvm/llvm-project/pull/106137