raw_ostream.cpp: Introduce <fcntl.h> to let O_BINARY provided. Or, llvm::outs() would be set to O_TEXT by default.

llvm/test/Object/check_binary_output.ll is expected to pass on win32.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186480 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Support/raw_ostream.cpp

@@ -27,6 +27,11 @@
 #include <cerrno>
 #include <sys/stat.h>
 
+// <fcntl.h> may provide O_BINARY.
+#if defined(HAVE_FCNTL_H)
+# include <fcntl.h>
+#endif
+
 #if defined(HAVE_UNISTD_H)
 # include <unistd.h>
 #endif