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

Similar to rL328848.
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
index 0d501ea..ea94067 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
@@ -113,8 +113,9 @@
   // extend .file to support this.
   unsigned CUID = Asm->OutStreamer->hasRawTextSupport() ? 0 : getUniqueID();
   if (!File)
-    return Asm->OutStreamer->EmitDwarfFileDirective(0, "", "", None, None, CUID);
-  return Asm->OutStreamer->EmitDwarfFileDirective(
+    return Asm->OutStreamer->emitDwarfFileDirective(0, "", "", None, None,
+                                                    CUID);
+  return Asm->OutStreamer->emitDwarfFileDirective(
       0, File->getDirectory(), File->getFilename(), getMD5AsBytes(File),
       File->getSource(), CUID);
 }