[Support/ELF] Add missing DF_1_XXX bits

[davide]

Summary

ELFDumper can't correctly decode DF_FLAGS_1.

e.g.

llvm-readobj -dynamic-table:
0x000000006FFFFFFB unknown

GNU readelf --dynamic:
0x000000006ffffffb (FLAGS_1) Flags: NODUMP

This is the first of two patches to add support for decoding (which is needed by lld tests for "-z" option).
It adds the missing DF_1_XXX bits to Support/Elf. The next patch (which builds on top of this one) will take care of the llvm-readobj missing bits.

[echristo]

LGTM thanks!

-eric

llvm/trunk/include/llvm/Support/ELF.h

enum {
   DF_1_DIRECT     = 0x00000100, // Direct binding enabled.
   DF_1_TRANS      = 0x00000200,
   DF_1_INTERPOSE  = 0x00000400, // Object is used to interpose.
   DF_1_NODEFLIB   = 0x00000800, // Ignore default lib search path.
   DF_1_NODUMP     = 0x00001000, // Object can't be dldump'ed.
   DF_1_CONFALT    = 0x00002000, // Configuration alternative created.
   DF_1_ENDFILTEE  = 0x00004000, // Filtee terminates filters search.
   DF_1_DISPRELDNE = 0x00008000, // Disp reloc applied at build time.
-  DF_1_DISPRELPND = 0x00010000  // Disp reloc applied at run-time.
+  DF_1_DISPRELPND = 0x00010000, // Disp reloc applied at run-time.
+  DF_1_NODIRECT   = 0x00020000, // Object has no-direct binding.
+  DF_1_IGNMULDEF  = 0x00040000,
+  DF_1_NOKSYMS    = 0x00080000,
+  DF_1_NOHDR      = 0x00100000,
+  DF_1_EDITED     = 0x00200000, // Object is modified after built.
+  DF_1_NORELOC    = 0x00400000,
+  DF_1_SYMINTPOSE = 0x00800000, // Object has individual interposers.
+  DF_1_GLOBAUDIT  = 0x01000000, // Global auditing required.
+  DF_1_SINGLETON  = 0x02000000  // Singleton symbols are used.
 };
 
 // DT_MIPS_FLAGS values.
 enum {
   RHF_NONE                    = 0x00000000, // No flags.
   RHF_QUICKSTART              = 0x00000001, // Uses shortcut pointers.
   RHF_NOTPOT                  = 0x00000002, // Hash size is not a power of two.
   RHS_NO_LIBRARY_REPLACEMENT  = 0x00000004, // Ignore LD_LIBRARY_PATH.