[gcc r13-5455] libstdc++: Use constant for name of tzdata file

[Jonathan Wakely]

https://gcc.gnu.org/g:def6e12e3488557dde9665db620ca53f9424713e

commit r13-5455-gdef6e12e3488557dde9665db620ca53f9424713e
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Fri Jan 27 11:29:21 2023 +0000

    libstdc++: Use constant for name of tzdata file
    
    There's a string_view with this filename, which should have been used
    instead of a string literal.
    
    libstdc++-v3/ChangeLog:
    
            * src/c++20/tzdb.cc (tzdata_stream): Use constant instead of
            string literal.

Diff:
---
 libstdc++-v3/src/c++20/tzdb.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libstdc++-v3/src/c++20/tzdb.cc b/libstdc++-v3/src/c++20/tzdb.cc
index c956e861891..2e7e173f0ef 100644
--- a/libstdc++-v3/src/c++20/tzdb.cc
+++ b/libstdc++-v3/src/c++20/tzdb.cc
@@ -1106,7 +1106,7 @@ namespace std::chrono
 
       tzdata_stream() : istream(nullptr)
       {
-	if (string path = zoneinfo_file("/tzdata.zi"); !path.empty())
+	if (string path = zoneinfo_file(tzdata_file); !path.empty())
 	{
 	  filebuf fbuf;
 	  if (fbuf.open(path, std::ios::in))