[Flang] Fix compilation on MinGW-w64

Reviewed By: Meinersbur

Differential Revision: https://reviews.llvm.org/D94707

Author: MehdiChinoune

flang/runtime/file.cpp

@@ -14,12 +14,12 @@
 #include <cstring>
 #include <fcntl.h>
 #include <stdlib.h>
+#include <sys/stat.h>
 #ifdef _WIN32
 #define NOMINMAX
 #include <io.h>
 #include <windows.h>
 #else
-#include <sys/stat.h>
 #include <unistd.h>
 #endif
 

flang/tools/flang-driver/driver.cpp

@@ -131,7 +131,7 @@ int main(int argc_, const char **argv_) {
     // information if possible.
     isCrash = CommandRes < 0;
 #ifdef _WIN32
-    IsCrash |= CommandRes == 3;
+    isCrash |= CommandRes == 3;
 #endif
     if (isCrash) {
       theDriver.generateCompilationDiagnostics(*c, *failingCommand);