Merge pull request #58710 from apple/egorzhdan/glibc-assert

[Glibc] Add missing C stdlib header

Author: egorzhdan

stdlib/public/Platform/glibc.modulemap.gyb

@@ -42,6 +42,10 @@ module SwiftGlibc [system] {
 % end
 
   header "SwiftGlibc.h"
+
+  // <assert.h>'s use of NDEBUG requires textual inclusion. 
+  textual header "assert.h"
+
   export *
 }