Use raw_pwrite_stream in the object writer/streamer.

The ELF object writer will take advantage of that in the next commit.

llvm-svn: 234950
diff --git a/llvm/lib/Target/Sparc/MCTargetDesc/SparcELFObjectWriter.cpp b/llvm/lib/Target/Sparc/MCTargetDesc/SparcELFObjectWriter.cpp
index 2fefd0c..98ba7e6 100644
--- a/llvm/lib/Target/Sparc/MCTargetDesc/SparcELFObjectWriter.cpp
+++ b/llvm/lib/Target/Sparc/MCTargetDesc/SparcELFObjectWriter.cpp
@@ -105,8 +105,8 @@
   return ELF::R_SPARC_NONE;
 }
 
-MCObjectWriter *llvm::createSparcELFObjectWriter(raw_ostream &OS, bool Is64Bit,
-                                                 uint8_t OSABI) {
+MCObjectWriter *llvm::createSparcELFObjectWriter(raw_pwrite_stream &OS,
+                                                 bool Is64Bit, uint8_t OSABI) {
   MCELFObjectTargetWriter *MOTW = new SparcELFObjectWriter(Is64Bit, OSABI);
   return createELFObjectWriter(MOTW, OS,  /*IsLittleEndian=*/false);
 }