[AsmPrinter] De-capitalize some AsmPrinter::Emit* functions

Similar to rL328848.
diff --git a/llvm/lib/MC/MCELFStreamer.cpp b/llvm/lib/MC/MCELFStreamer.cpp
index 0a0c30d..4d098a8 100644
--- a/llvm/lib/MC/MCELFStreamer.cpp
+++ b/llvm/lib/MC/MCELFStreamer.cpp
@@ -106,10 +106,10 @@
     Symbol->setType(ELF::STT_TLS);
 }
 
-void MCELFStreamer::EmitLabelAtPos(MCSymbol *S, SMLoc Loc, MCFragment *F,
+void MCELFStreamer::emitLabelAtPos(MCSymbol *S, SMLoc Loc, MCFragment *F,
                                    uint64_t Offset) {
   auto *Symbol = cast<MCSymbolELF>(S);
-  MCObjectStreamer::EmitLabelAtPos(Symbol, Loc, F, Offset);
+  MCObjectStreamer::emitLabelAtPos(Symbol, Loc, F, Offset);
 
   const MCSectionELF &Section =
       static_cast<const MCSectionELF &>(*getCurrentSectionOnly());