llvm: Fix data layout string for s390x-zos.

Author: alexrp

src/codegen/llvm.zig

@@ -399,7 +399,7 @@ pub fn dataLayout(target: std.Target) []const u8 {
  .sparc => "E-m:e-p:32:32-i64:64-i128:128-f128:64-n32-S64",
  .sparc64 => "E-m:e-i64:64-i128:128-n32:64-S128",
  .s390x => if (target.os.tag == .zos)
- "E-m:l-i1:8:16-i8:8:16-i64:64-f128:64-v128:64-a:8:16-n32:64"
+ "E-m:l-p1:32:32-i1:8:16-i8:8:16-i64:64-f128:64-v128:64-a:8:16-n32:64"
  else
  "E-m:e-i1:8:16-i8:8:16-i64:64-f128:64-v128:64-a:8:16-n32:64",
  .x86 => switch (target.os.tag) {