[SystemZ][z/OS] csv files should be text files

This patch sets the OF_Text flag correctly for the csv file.

Reviewed By: anirudhp

Differential Revision: https://reviews.llvm.org/D99285

clang/lib/Driver/Driver.cpp

@@ -4081,7 +4081,8 @@ void Driver::BuildJobs(Compilation &C) const {
         Out.flush();
         std::error_code EC;
         llvm::raw_fd_ostream OS(CCPrintStatReportFilename, EC,
-                                llvm::sys::fs::OF_Append);
+                                llvm::sys::fs::OF_Append |
+                                    llvm::sys::fs::OF_Text);
         if (EC)
           return;
         auto L = OS.lock();