Importing rustc-1.56.0

Change-Id: I98941481270706fa55f8fb2cb91686ae3bd30f38
diff --git a/src/llvm-project/compiler-rt/lib/scudo/standalone/flags_parser.h b/src/llvm-project/compiler-rt/lib/scudo/standalone/flags_parser.h
index 32511f7..ba832ad 100644
--- a/src/llvm-project/compiler-rt/lib/scudo/standalone/flags_parser.h
+++ b/src/llvm-project/compiler-rt/lib/scudo/standalone/flags_parser.h
@@ -29,7 +29,7 @@
   void printFlagDescriptions();
 
 private:
-  static const u32 MaxFlags = 16;
+  static const u32 MaxFlags = 20;
   struct Flag {
     const char *Name;
     const char *Desc;