Move vfprintf.c out from sysdeps (XCC)

While debugging, I noticed that sysdeps/akaros/vfprintf.c isn't always
used.  Both sysdeps/akaros/vfprintf.c *and* stdio-common/vfprintf.c are
compiled.  This is because some of the other printf C files in stdio-common
 #include vfprintf.c directly, and those get the old version.

Keeping two versions will lead to even more insanity, so we'll just modify
the non-sysdep version.

Rebuild glibc and cross your fingers.

Signed-off-by: Barret Rhoden <brho@cs.berkeley.edu>
diff --git a/tools/compilers/gcc-glibc/glibc-2.19-akaros/sysdeps/akaros/vfprintf.c b/tools/compilers/gcc-glibc/glibc-2.19-akaros/stdio-common/vfprintf.c
similarity index 100%
rename from tools/compilers/gcc-glibc/glibc-2.19-akaros/sysdeps/akaros/vfprintf.c
rename to tools/compilers/gcc-glibc/glibc-2.19-akaros/stdio-common/vfprintf.c