Hi @Littell,
This is what I found.
In SDK 2.15.100 you can find those files located in these directories:
For wifi_cli: SDK_2_15_100_MIMXRT1170-EVKB\boards\evkbmimxrt1170\wifi_examples\wifi_cli\sg-lib
For wifi-wpa_supplicant: SDK_2_15_100_MIMXRT1170-EVKB\boards\evkbmimxrt1170\wifi_examples\wifi_wpa_supplicant\sg-lib
This is where they come from when importing the examples.
Nevertheless, in the latest SDK 2.16.000, these files are no longer in the SDK.
I hope this helps,
Daniel.