llc: Try to make the output executable

To emulate the behavior of native linkers

Author: alexp-sssup

llvm/tools/llc/llc.cpp

@@ -760,6 +760,9 @@ static int compileModule(char **argv, LLVMContext &Context) {
 
   // Declare success.
   Out->keep();
+  // Try to make the output executable, some build systems depend on it
+  sys::fs::perms NewPerms = static_cast<sys::fs::perms>(0755);
+  sys::fs::setPermissions(OutputFilename, NewPerms);
   if (DwoOut)
     DwoOut->keep();