[gcc(refs/vendors/ARM/heads/arm-9-branch)] libstdc++: Fix date of changelog entry

[Vidya Praveen]

https://gcc.gnu.org/g:d626e49c438453c2f161c586d9df3d5e0a67d09a

commit d626e49c438453c2f161c586d9df3d5e0a67d09a
Author: Thomas Rodgers <rodgert@appliantology.com>
Date:   Thu Apr 23 13:57:01 2020 -0700

    libstdc++: Fix date of changelog entry

Diff:
---
 libstdc++-v3/ChangeLog | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index af94bd2b130..3f9eb05afc0 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,5 +1,7 @@
-2020-04-20  Thomas Rodgers  <trodgers@redhat.com>
+2020-04-23  Thomas Rodgers  <trodgers@redhat.com>
 
+	Backport from mainline
+	2020-04-20  Thomas Rodgers  <trodgers@redhat.com>
 	* testsuite/lib/libstdc++.exp: Add additional_flags=
 	-DTBB_SUPRESS_DEPRECATED_MESSAGES=1 to suppress warnings when
 	compiling with a newer Thread Building Blocks.