fix lto-type-mismatch between declarations

[caveman99]

.pio/libdeps/tbeam/NimBLE-Arduino/src/nimble/nimble/host/src/ble_gap.c:7944:16: warning: type of 'is_ble_hs_resolv_enabled' does not match original declaration [-Wlto-type-mismatch]
     extern int is_ble_hs_resolv_enabled(void);
                ^
.pio/libdeps/tbeam/NimBLE-Arduino/src/nimble/nimble/host/src/ble_hs_resolv.c:331:1: note: return value type mismatch
 is_ble_hs_resolv_enabled(void)
 ^
.pio/libdeps/tbeam/NimBLE-Arduino/src/nimble/nimble/host/src/ble_hs_resolv.c:331:1: note: type 'uint8_t' should match type 'int'
.pio/libdeps/tbeam/NimBLE-Arduino/src/nimble/nimble/host/src/ble_hs_resolv.c:331:1: note: 'is_ble_hs_resolv_enabled' was previously declared here
.pio/libdeps/tbeam/Crypto/AESEsp32.cpp:33:5: warning: type of 'esp_aes_setkey' does not match original declaration [-Wlto-type-mismatch]

[h2zero]

Thank you @caveman99. I haven't seen this warning before, can you share your environment settings?

The issue with merging this is that it is not mirrored upstream: https://github.com/espressif/esp-nimble/blob/70439dd17c4754964bf6c99b8e27c94ac32bccae/nimble/host/src/ble_gap.c#L9437

I aim to minimize the differences between this and the upstream code as much as possible, only fixing what is required for the purpose here.

[h2zero]

Thanks @caveman99, I just merged nimble core 1.6 so this may no longer be an issue. Please open a new PR against the current master if so.