* [ktx] Update to 4.1.0-rc3.
This also fixes a compilation error with the previous port version (4.1.0-rc2) when using feature ktx[tools].
* [ktx] Fix gnu libtool detection.
Co-authored-by: Billy O'Neal <bion@microsoft.com>
Co-authored-by: Jonliu1993 <13720414433@163.com>