Tweak for no-libio-install

[Benjamin Kosnik]

the relevant bits of my "make install" log. Notice no errors...

[snip]
if test -z ""; then \
for i in algorithm bitset cassert cctype cerrno cfloat climits clocale
ciso646 cmath complex csetjmp csignal cstdarg cstddef cstdio cstdlib
cstring ctime cwchar cwctype deque exception fstream functional iomanip
ios iosfwd iostream istream iterator limits list locale map memory new
numeric ostream queue set sstream stack stdexcept streambuf string
typeinfo utility valarray vector ; do \
  echo "/usr/bin/install -c -m 644 ../../src.egcs/libstdc++-v4/std/$i
/mnt/hd/bliss/H-x86-temp/include/g++-v3/"; \
        /usr/bin/install -c -m 644 ../../src.egcs/libstdc++-v4/std/$i
/mnt/hd/bliss/H-x86-temp/include/g++-v3/; \
done; \
for i in bits/std_limits.h bits/c++config.h bits/c++threads.h
bits/c++io.h; do \
  echo "/usr/bin/install -c -m 644 ../$i
/mnt/hd/bliss/H-x86-temp/include/g++-v3/bits/"; \
        /usr/bin/install -c -m 644 ../$i
/mnt/hd/bliss/H-x86-temp/include/g++-v3/bits/; \
done; \
for i in ; do \
  echo "/usr/bin/install -c -m 644 $i
/mnt/hd/bliss/H-x86-temp/include/g++-v3/"; \
        /usr/bin/install -c -m 644 $i
/mnt/hd/bliss/H-x86-temp/include/g++-v3/; \
done; \
fi;
/usr/bin/install -c -m 644 ../../src.egcs/libstdc++-v4/std/algorithm
/mnt/hd/bliss/H-x86-temp/include/g++-v3/
/usr/bin/install -c -m 644 ../../src.egcs/libstdc++-v4/std/bitset
/mnt/hd/bliss/H-x86-temp/include/g++-v3/
/usr/bin/install -c -m 644 ../../src.egcs/libstdc++-v4/std/cassert
/mnt/hd/bliss/H-x86-temp/include/g++-v3/
[snip]