Remove BssSection::reserveSpace().

We no longer call reserveSpace more than once, so it can be merged with
its constructor.

llvm-svn: 314867
diff --git a/lld/ELF/Writer.cpp b/lld/ELF/Writer.cpp
index 7deb6b3..3fbe22a 100644
--- a/lld/ELF/Writer.cpp
+++ b/lld/ELF/Writer.cpp
@@ -290,9 +290,9 @@
     Add(InX::BuildId);
   }
 
-  InX::Bss = make<BssSection>(".bss");
+  InX::Bss = make<BssSection>(".bss", 0, 1);
   Add(InX::Bss);
-  InX::BssRelRo = make<BssSection>(".bss.rel.ro");
+  InX::BssRelRo = make<BssSection>(".bss.rel.ro", 0, 1);
   Add(InX::BssRelRo);
 
   // Add MIPS-specific sections.