File _multibuild of Package gcc10

<multibuild>
<flavor>gcc10</flavor>
<flavor>gcc10-testresults</flavor>
<flavor>cross-aarch64-gcc10-bootstrap</flavor>
<flavor>cross-aarch64-gcc10</flavor>
<flavor>cross-riscv64-gcc10-bootstrap</flavor>
<flavor>cross-riscv64-gcc10</flavor>
<flavor>cross-s390x-gcc10-bootstrap</flavor>
<flavor>cross-s390x-gcc10</flavor>
<flavor>cross-ppc64le-gcc10-bootstrap</flavor>
<flavor>cross-ppc64le-gcc10</flavor>
<flavor>cross-arm-gcc10</flavor>
<flavor>cross-avr-gcc10-bootstrap</flavor>
<flavor>cross-avr-gcc10</flavor>
<flavor>cross-pru-gcc10-bootstrap</flavor>
<flavor>cross-pru-gcc10</flavor>
<flavor>cross-x86_64-gcc10</flavor>
<flavor>cross-sparc-gcc10</flavor>
<flavor>cross-sparc64-gcc10</flavor>
<flavor>cross-ppc64-gcc10</flavor>
<flavor>cross-m68k-gcc10</flavor>
<flavor>cross-mips-gcc10</flavor>
<flavor>cross-hppa-gcc10-bootstrap</flavor>
<flavor>cross-hppa-gcc10</flavor>
<flavor>cross-arm-none-gcc10-bootstrap</flavor>
<flavor>cross-arm-none-gcc10</flavor>
<flavor>cross-epiphany-gcc10-bootstrap</flavor>
<flavor>cross-epiphany-gcc10</flavor>
<flavor>cross-riscv64-elf-gcc10-bootstrap</flavor>
<flavor>cross-riscv64-elf-gcc10</flavor>
<flavor>cross-rx-gcc10-bootstrap</flavor>
<flavor>cross-rx-gcc10</flavor>
<flavor>cross-nvptx-gcc10</flavor>
<flavor>cross-amdgcn-gcc10</flavor>
<flavor>cross-bpf-gcc10</flavor>
</multibuild>