[BOLT] Fix unconditional output of boltedcollection in merge-fdata (#78653)

Fix the bug where merge-fdata unconditionally outputs boltedcollection 
line, regardless of whether input files have it set.

Test Plan:
Added bolt/test/X86/merge-fdata-nobat-mode.test which fails without this
fix.

1 files changed, 2 insertions, 0 deletions

diff --git a/llvm/lib/MC/MCStreamer.cpp b/llvm/lib/MC/MCStreamer.cpp
index bc145ae..5738ae2 100644
--- a/llvm/lib/MC/MCStreamer.cpp
+++ b/llvm/lib/MC/MCStreamer.cpp
@@ -1234,6 +1234,8 @@ void MCStreamer::emitValueToAlignment(Align Alignment, int64_t Value,
                                       unsigned MaxBytesToEmit) {}
 void MCStreamer::emitCodeAlignment(Align Alignment, const MCSubtargetInfo *STI,
                                    unsigned MaxBytesToEmit) {}
+void MCStreamer::emitNeverAlignCodeAtEnd(unsigned ByteAlignment,
+                                         const MCSubtargetInfo &STI) {}
 void MCStreamer::emitValueToOffset(const MCExpr *Offset, unsigned char Value,
                                    SMLoc Loc) {}
 void MCStreamer::emitBundleAlignMode(Align Alignment) {}