small suggestion for make install

[Trent Jarvi]

I notice make install puts a copy of the man pages for each cross compiler.

-rw-r--r--   1 root     root       108776 Nov 23 17:49 ./man1/gcc.1
-rw-r--r--   1 root     root       108776 Nov 22 21:31 ./man1/i486-unknown-cygwin32-gcc.1
-rw-r--r--   1 root     root       108776 Nov 22 13:13 ./man1/i486-unknown-go32-gcc.1
-rw-r--r--   1 root     root       108776 Nov 23 03:37 ./man1/i486-unknown-linuxlibc1-gcc.1

I'm not sure if this is desired (copy file without target name and then symlink)
or an oversite (just copy file without target name).

let me know whats right and I'll offer a trivial patch.