[K42-discussion] lib-emu header patch

[Patrick Bozeman]

As part of the enchanced procfs support I am working on, I needed to 
include <io/FileLinux.H> in ProcessLinux.H so that I could ask a 
ProcessLinux object to return a FileLinux::Stat for a given fd.  
However, simply including FileLinux.H in ProcessLinux.H broke the 
compilation and linking of lib emu.  The two most common errors were as 
follows:

example of compile error:
/home/peb/src/k42-devel-patches/k42/kitchsrc/kitch-linux/lib/emu/recv.C:44: 
error: `
   __k42_linux_recvfrom' undeclared (first use this function)

example of post link error:
powerpc64-linux-nm -p k42sys.o | egrep -w U
                 U .__k42_linux_connect
Error:  undefined symbols found in k42sys.o

The attached patch allows ProcessLinux.H to include FileLinux.H.  The 
ProcessLinux::getFDStatus part will come in a future patch.
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