Add MIPS bits/floatn.h.

This patch adds a MIPS-specific bits/floatn.h header.  This header is
identical to the ldbl-128 version except for the comment at the top;
the purpose is to ensure that a 32-bit MIPS build installs a header
that is the same as in a 64-bit MIPS build and so properly shows
_Float128 support to be available for 64-bit compilations, on the
general principle of an installation for one multilib providing
headers also suitable for other multilibs.

Tested with build-many-glibcs.py.

	* sysdeps/mips/ieee754/bits/floatn.h: New file.

1 files changed, 2 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index eb0ba1f6fa..dec8924bdd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,7 @@
 2017-10-19  Joseph Myers  <joseph@codesourcery.com>
 
+	* sysdeps/mips/ieee754/bits/floatn.h: New file.
+
 	[BZ #22322]
 	* sysdeps/mips/bits/long-double.h: Move to ....
 	* sysdeps/mips/ieee754/bits/long-double.h: ... here.