[ARM] Correct missing newline after outputting .tlsdescseq directive.

[ostannard]

LGTM

llvm/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp

 void ARMTargetAsmStreamer::emitFPU(unsigned FPU) {
   OS << "\t.fpu\t" << ARM::getFPUName(FPU) << "\n";
 }
 
 void ARMTargetAsmStreamer::finishAttributeSection() {}
 
 void
 ARMTargetAsmStreamer::AnnotateTLSDescriptorSequence(const MCSymbolRefExpr *S) {
-  OS << "\t.tlsdescseq\t" << S->getSymbol().getName();
+  OS << "\t.tlsdescseq\t" << S->getSymbol().getName() << "\n";
 }
 
 void ARMTargetAsmStreamer::emitThumbSet(MCSymbol *Symbol, const MCExpr *Value) {
   const MCAsmInfo *MAI = Streamer.getContext().getAsmInfo();
 
   OS << "\t.thumb_set\t";
   Symbol->print(OS, MAI);
   OS << ", ";

llvm/test/MC/ARM/directive-tlsdescseq.s

 @ CHECK:     0x4 R_ARM_TLS_DESCSEQ variable 0x0
 @ CHECK:     0x8 R_ARM_TLS_DESCSEQ variable 0x0
 @ CHECK:     0xC R_ARM_TLS_DESCSEQ variable 0x0
 @ CHECK:     0x10 R_ARM_TLS_GOTDESC variable 0x0
 @ CHECK: ]
 
 @ CHECK-ASM: ldr r1, [pc, #8]
 @ CHECK-ASM: .tlsdescseq variable
-@ CHECK-ASM: add r2, pc, r1
+@ CHECK-ASM-NEXT: add r2, pc, r1
 @ CHECK-ASM: .tlsdescseq variable
-@ CHECK-ASM: ldr r3, [r1, #4]
+@ CHECK-ASM-NEXT: ldr r3, [r1, #4]
 @ CHECK-ASM: .tlsdescseq variable
-@ CHECK-ASM: blx r3
+@ CHECK-ASM-NEXT: blx r3