File _multibuild of Package gcc16

<multibuild>
<flavor>gcc16-testresults</flavor>
<flavor>cross-aarch64-gcc16-bootstrap</flavor>
<flavor>cross-aarch64-gcc16</flavor>
<flavor>cross-loongarch64-gcc16-bootstrap</flavor>
<flavor>cross-loongarch64-gcc16</flavor>
<flavor>cross-riscv64-gcc16-bootstrap</flavor>
<flavor>cross-riscv64-gcc16</flavor>
<flavor>cross-s390x-gcc16-bootstrap</flavor>
<flavor>cross-s390x-gcc16</flavor>
<flavor>cross-ppc64le-gcc16-bootstrap</flavor>
<flavor>cross-ppc64le-gcc16</flavor>
<flavor>cross-hppa-gcc16-bootstrap</flavor>
<flavor>cross-hppa-gcc16</flavor>
<flavor>cross-arm-gcc16</flavor>
<flavor>cross-avr-gcc16-bootstrap</flavor>
<flavor>cross-avr-gcc16</flavor>
<flavor>cross-pru-gcc16-bootstrap</flavor>
<flavor>cross-pru-gcc16</flavor>
<flavor>cross-x86_64-gcc16</flavor>
<flavor>cross-ppc64-gcc16</flavor>
<flavor>cross-arm-none-gcc16-bootstrap</flavor>
<flavor>cross-arm-none-gcc16</flavor>
<flavor>cross-riscv64-elf-gcc16-bootstrap</flavor>
<flavor>cross-riscv64-elf-gcc16</flavor>
<flavor>cross-rx-gcc16-bootstrap</flavor>
<flavor>cross-rx-gcc16</flavor>
<flavor>cross-nvptx-gcc16</flavor>
<flavor>cross-amdgcn-gcc16</flavor>
<flavor>cross-bpf-gcc16</flavor>
</multibuild>