Snippets for apparmor 4.1.7 from Alpine armv7

Sourced from https://build.alpinelinux.org/buildlogs/build-edge-armv7/main/apparmor/apparmor-4.1.7-r2.log.

• libapparmor_wrap.c:692:37: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare]
    692 |     for (cast = head; (cast - head) <= head->value; cast++) {
        |                                     ^~
  

• libapparmor_wrap.c:8154:41: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare]
   8154 |         for (cast = head; (cast - head) <= head->value; cast++) {
        |                                         ^~
  

• policy_compat.cc:168:17: warning: 'uint32_t map_xbits(uint32_t)' defined but not used [-Wunused-function]
    168 | static uint32_t map_xbits(uint32_t x)
        |                 ^~~~~~~~~
  

• chfa.cc:555:54: warning: unused parameter 'prompt' [-Wunused-parameter]
    555 |                                bool accept_idx, bool prompt,
        |                                                 ~~~~~^~~~~~
  

• aa_load.c:90:36: warning: unused parameter 'file' [-Wunused-parameter]
     90 | static int load_config(const char *file)
        |                        ~~~~~~~~~~~~^~~~