Fixes after recent configure changes relating to static libraries

This commit:

  commit e7c26e04 (tjteru/master)
  Date:   Wed Jan 22 14:54:26 2020 +0000

      gcc: Add new configure options to allow static libraries to be selected

contains a couple of issues.  First I failed to correctly regenerate
all of the configure files it should have done.  Second, there was a
mistake in lib-link.m4, one of the conditions didn't use pure sh
syntax, I wrote this:

  if x$lib_type = xauto || x$lib_type = xshared; then

When I should have written this:

  if test "x$lib_type" = "xauto" || test "x$lib_type" = "xshared"; then

These issues were raised on the mailing list in these messages:

  https://gcc.gnu.org/ml/gcc-patches/2020-01/msg01827.html
  https://gcc.gnu.org/ml/gcc-patches/2020-01/msg01921.html

config/ChangeLog:

	* lib-link.m4 (AC_LIB_LINKFLAGS_BODY): Update shell syntax.

gcc/ChangeLog:

	* configure: Regenerate.

intl/ChangeLog:

	* configure: Regenerate.

libcpp/ChangeLog:

	* configure: Regenerate.

libstdc++-v3/ChangeLog:

	* configure: Regenerate.