[yaml2obj] - Alow Size tag for describing SHT_HASH sections.

This is a follow-up for D68085 which allows using "Size"
tag together with "Content" tag or alone.

Differential revision: https://reviews.llvm.org/D68216

llvm-svn: 373473
diff --git a/llvm/lib/ObjectYAML/ELFEmitter.cpp b/llvm/lib/ObjectYAML/ELFEmitter.cpp
index 1651d60..c85cf4c 100644
--- a/llvm/lib/ObjectYAML/ELFEmitter.cpp
+++ b/llvm/lib/ObjectYAML/ELFEmitter.cpp
@@ -824,8 +824,8 @@
   if (Section.Link.empty() && SN2I.lookup(".dynsym", Link))
     SHeader.sh_link = Link;
 
-  if (Section.Content) {
-    SHeader.sh_size = writeContent(OS, Section.Content, None);
+  if (Section.Content || Section.Size) {
+    SHeader.sh_size = writeContent(OS, Section.Content, Section.Size);
     return;
   }