[llvm-dwarfdump] Add blank line after printing line table

[jhenderson]

Summary

This helps delineate it in the output from later tables or other output.

Depends on D71276.

llvm/lib/DebugInfo/DWARF/DWARFDebugLine.cpp

void DWARFDebugLine::LineTable::dump(raw_ostream &OS,
   OS << '\n';
 
   if (!Rows.empty()) {
     Row::dumpTableHeader(OS);
     for (const Row &R : Rows) {
       R.dump(OS);
     }
   }
+
+  // Terminate the table with a final blank line to clearly delineate it from
+  // later dumps.
+  OS << '\n';
 }
 
 void DWARFDebugLine::LineTable::clear() {
   Prologue.clear();
   Rows.clear();
   Sequences.clear();
 }
 

llvm/test/tools/llvm-dwarfdump/X86/debug-line.s

 # CHECK-NEXT:        mod_time: 0x12345678
 # CHECK-NEXT:          length: 0x00000010
 # CHECK-EMPTY:
 # CHECK-NEXT: Address            Line   Column File   ISA Discriminator Flags
 # CHECK-NEXT: ------------------ ------ ------ ------ --- ------------- -------------
 # CHECK-NEXT: 0x0000000000000002      1      0      1   0             0  is_stmt
 # CHECK-NEXT: 0x0000000000000002      1      4      3   0             0  is_stmt
 # CHECK-NEXT: 0x0000000000000024      1      4      3   5             6  basic_block prologue_end epilogue_begin end_sequence
+# CHECK-EMPTY:
 # CHECK-NEXT: debug_line[0x0000006d]
 # CHECK-NEXT: Line table prologue:
 # CHECK-NEXT:     total_length: 0x0000001b
 # CHECK-NEXT:          version: 4
 # CHECK-NEXT:  prologue_length: 0x00000015
 # CHECK-NEXT:  min_inst_length: 2
 # CHECK-NEXT: max_ops_per_inst: 4
 # CHECK-NEXT:  default_is_stmt: 0