tests: Free returned XKB map

Signed-off-by: Daniel Stone <daniel@fooishbar.org>

test/filecomp.c

@@ -80,5 +80,7 @@ int main(int argc, char *argv[])
         exit(1);
     }
 
+    xkb_free_keymap(xkb);
+
     return 0;
 }

test/namescomp.c

@@ -58,5 +58,7 @@ int main(int argc, char *argv[])
         exit(1);
     }
 
+    xkb_free_keymap(xkb);
+
     return 0;
 }

test/rulescomp.c

@@ -57,5 +57,7 @@ int main(int argc, char *argv[])
         exit(1);
     }
 
+    xkb_free_keymap(xkb);
+
     return 0;
 }