Add AsmParser support for the ELF .previous directive. Patch by Roman Divacky.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112849 91177308-0d34-0410-b5e6-96231b3b80d8

lib/MC/MCObjectStreamer.cpp

@@ -77,6 +77,7 @@ void MCObjectStreamer::SwitchSection(const MCSection *Section) {
   // If already in this section, then this is a noop.
   if (Section == CurSection) return;
 
+  PrevSection = CurSection;
   CurSection = Section;
   CurSectionData = &getAssembler().getOrCreateSectionData(*Section);
 }