[SystemZ][z/OS] Add missing include

[yusra.syeda]

Summary

This patch adds a missing include to llvm/include/llvm/BinaryFormat/GOFF.h

[mib]

LGTM! Thanks!

[Kai]

LGTM.

llvm/include/llvm/BinaryFormat/GOFF.h

 // constants for the GOFF file format.
 //
 // GOFF specifics can be found in MVS Program Management: Advanced Facilities
 //===----------------------------------------------------------------------===//
 
 #ifndef LLVM_BINARYFORMAT_GOFF_H
 #define LLVM_BINARYFORMAT_GOFF_H
 
+#include "llvm/Support/DataTypes.h"
+
 namespace llvm {
 
 namespace GOFF {
 
 // \brief Subsections of the primary C_CODE section in the object file.
 enum SubsectionKind : uint8_t {
   SK_PPA1 = 2,
 };
 
 } // end namespace GOFF
 
 } // end namespace llvm
 
 #endif // LLVM_BINARYFORMAT_GOFF_H