[Buildroot] [git commit] support/download/svn: use 'svn info' whith LC_ALL=C

[Julien Olivain]

commit: https://git.buildroot.net/buildroot/commit/?id=8d3b1781f639c174de3b09e292179f6f81da61f1
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/master

Use the 'C' locale when retrieving the date of the last change using
'svn info' since the svn download helper script expect
"Last Changed Date" string.

If another locale is used, the 'date' is empty so the generated
archive (by mk_tar_gz) will not match the expected hash since
the file timestamp is not set properly.

If LANG=fr_FR.UTF-8 is defined in the host system, svn print some
"French encrypted" text:

  eval svn --non-interactive --config-option servers:global:http-timeout=10 info ''\''https://svn.code.sf.net/p/xmlrpc-c/code/advanced@r3176'\'''
  ...
  Date de la dernière modification: 2023-09-02 19:13:35 +0200 (sam. 02 sept. 2023)

diffoscope confirm that the file timestamp is not set correctly
in the generated archive:

$ diffoscope NOK/libxmlrpc-r3176-svn5.tar.gz OK/libxmlrpc-r3176-svn5.tar.gz

Signed-off-by: Julien Olivain <ju.o at free.fr>
---
 support/download/svn | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/support/download/svn b/support/download/svn
index ff33f1fa39..576fd48303 100755
--- a/support/download/svn
+++ b/support/download/svn
@@ -81,7 +81,7 @@ done
 # In case there is a redirection (e.g. http -> https), just keep the
 # last line (svn outputs everything on stdout)
 # shellcheck disable=SC2086 # creds may be empty
-date="$( _plain_svn info ${creds} "'${uri}@${rev}'" \
+date="$( LC_ALL=C _plain_svn info ${creds} "'${uri}@${rev}'" \
         |sed -r -e '/^Last Changed Date: /!d; s///'
        )"