ci: Disable linux-ppc64le build
ci: Disable linux-ppc64le build

Package installation issues per Issue #430.

dockcross/dockcross,thewtex/cross-compilers,thewtex/cross-compilers,dockcross/dockcross,thewtex/cross-compilers,thewtex/cross-compilers,dockcross/dockcross,dockcross/dockcross