Detect GFortran module files as generated

test/fixtures/Generated/ms2.mod

@@ -0,0 +1,19 @@
+GFORTRAN module version '0' created from ms2.f90 on Thu Sep  5 10:09:19 2013
+MD5:8a80cd5db1bc612a28603959302dbf37 -- If you edit this, you'll get what you deserve.
+
+(() () () () () () () () () () () () () () () () () () () () () () () ()
+() () ())
+
+()
+
+()
+
+()
+
+()
+
+(2 'ms2' 'ms2' 'ms2' 1 ((MODULE UNKNOWN-INTENT UNKNOWN-PROC UNKNOWN
+UNKNOWN) (UNKNOWN 0 0 0 UNKNOWN ()) 0 0 () () 0 () () () 0 0)
+)
+
+('ms2' 0 2)