Fix incorrect linker script patterns

Fix incorrect linker script patterns

The recent changes to support operator<<(nullptr_t) changed the glob
patterns for existing operator<<(T) overloads, but did so incorrectly so
they still matched the new symbols. That broke Solaris bootstrap. This
patch replaces each of the existing globs by two more precise ones,
which match the old symbols but not the new ones.

	* config/abi/pre/gnu.ver (GLIBCXX_3.4): Correct recent changes to
	basic_ostream::operator<< patterns.

From-SVN: r267832