Add mod.file lost in 6d048d8766

tests/steady_state/Linear_steady_state_xfail.mod

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+// Test whether a nonlinear equation specfied as a linear model is correctly filtered out
+var A;
+
+varexo epsilona;
+parameters  rho;
+
+rho =   .42; 
+
+model(linear);
+log(A) = rho*log(A(-1)) + epsilona;
+end;
+
+initval;
+    A = 1.34;
+end;
+
+steady;
+
+
+
+
+
+