config.gcc: Consistently use solaris2.1[0-9]* instead of solaris2.1[0-9].

config.gcc: Consistently use solaris2.1[0-9]* instead of solaris2.1[0-9].

gcc:
	* config.gcc: Consistently use solaris2.1[0-9]* instead of
	solaris2.1[0-9].

libcpp:
	* configure.ac: Consistently use solaris2.1[0-9]* instead of
	solaris2.1[0-9].
	* configure: Regenerate.

From-SVN: r96743