patch 8.0.1529: assert_equalfile() does not close file descriptors

Problem:    Assert_equalfile() does not close file descriptors. (Coverity)
Solution:   Close the file descriptors.

src/eval.c

@@ -8889,6 +8889,8 @@ assert_equalfile(typval_T *argvars)
 		}
 		++count;
 	    }
+	    fclose(fd1);
+	    fclose(fd2);
 	}
     }
     if (IObuff[0] != NUL)

src/version.c

@@ -771,6 +771,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1529,
 /**/
     1528,
 /**/