- document skip_x64_x86 flag (tools.cross_building) (#1445)
- document skip_x64_x86 flag (tools.cross_building) (#1445)

Signed-off-by: SSE4 <96590f2cd2f24822a7d8bd20596928fbcb06105f@gmail.com>
conan-io/docs,conan-io/docs,conan-io/docs,conan-io/docs