[lib/ObjectYAML] - Add a full stop to the comment. NFC.

A test commit.
diff --git a/llvm/lib/ObjectYAML/ELFEmitter.cpp b/llvm/lib/ObjectYAML/ELFEmitter.cpp
index e0faed2..8ba1608 100644
--- a/llvm/lib/ObjectYAML/ELFEmitter.cpp
+++ b/llvm/lib/ObjectYAML/ELFEmitter.cpp
@@ -1119,7 +1119,7 @@
   std::vector<Elf_Shdr> SHeaders;
   State.initSectionHeaders(SHeaders, CBA);
 
-  // Now we can decide segment offsets
+  // Now we can decide segment offsets.
   State.setProgramHeaderLayout(PHeaders, SHeaders);
 
   if (State.HasError)