[glibc] aarch64: Add NEWS entry about libmvec for 2.39

[Szabolcs Nagy <nsz@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=7100d9ae21e2737f96f824259167788aabd8308f

commit 7100d9ae21e2737f96f824259167788aabd8308f
Author: Szabolcs Nagy <szabolcs.nagy@arm.com>
Date:   Wed Jan 3 09:06:38 2024 +0000

    aarch64: Add NEWS entry about libmvec for 2.39
    
    Auto-vectorizing scalar calls is now supported.
    
    Reviewed-by: Carlos O'Donell <carlos@redhat.com>

Diff:
---
 NEWS | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/NEWS b/NEWS
index 83ae627f47..16afc4f869 100644
--- a/NEWS
+++ b/NEWS
@@ -55,6 +55,13 @@ Major new features:
   unsigned char, unsigned short, unsigned int, unsigned long int and
   unsigned long long int, and a type-generic macro.
 
+* On AArch64 new symbols were added to libmvec and now math.h has
+  annotations to allow GCC 9 or newer to auto-vectorize calls to the
+  following scalar math functions when -ffast-math is specified:
+  acos, acosf, asin, asinf, atan, atanf, atan2, atan2f, cos, cosf,
+  exp, expf, exp10, exp10f, exp2, exp2f, expm1, expm1f, log, logf,
+  log10, log10f, log1p, log1pf, log2, log2f, sin, sinf, tan, tanf.
+
 Deprecated and removed features, and other changes affecting compatibility:
 
 * The ldconfig program now skips file names containing ';' or ending in