With the Android build system changes to ninja/kati, the use of .SECONDEXPANSION is no longer supported. Fix this by avoiding rule specific variables and using $(transform-generated-source). Cc: "11.1 11.2" <mesa-stable@lists.freedesktop.org> Signed-off-by: Rob Herring <robh@kernel.org> Reviewed-by: Emil Velikov <emil.velikov@collabora.com>