Replace some _MSC_VER with _WIN32.
This allows to use some code for mingw which was previously only
used for MSVC.

llvm-svn: 203651
diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp
index a33f27e..ffc948d 100644
--- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp
@@ -702,7 +702,7 @@
 
                 if (::mktemp (named_pipe_path))
                 {
-#if defined(_MSC_VER)
+#if defined(_WIN32)
                     if ( false )
 #else
                     if (::mkfifo(named_pipe_path, 0600) == 0)