Hi,
Build scripts for latest Rx version are not released in alignment with every OMAP release.
We do have RTM with release build instructions and notes for every SW release.
For R5_SP3 SW release, build guidelines at:
https://spsemea.itg.ti.com/sites/ti-israel/our%20business/wcs/soldel/RTM%20Software/R5.x/R5_SP3/Documents/WL12xx_WLAN_Android_BringUp_Manual_R5_SP3_v2.pdf
Thx,
Daniel