Manpages of gccgo-7 in Debian experimental

• go-7(1)
• gofmt-7(1)
• i686-linux-gnu-go-7(1)
• i686-linux-gnu-gofmt-7(1)
• powerpc-linux-gnu-go-7(1)
• powerpc-linux-gnu-gofmt-7(1)
• powerpc64le-linux-gnu-go-7(1)
• powerpc64le-linux-gnu-gofmt-7(1)
• x86_64-linux-gnu-go-7(1)
• x86_64-linux-gnu-gofmt-7(1)