[PATCH] tests: printf: provide explicit TZ start/end

[Grisha Levit]

POSIX says about the TZ variable:

    If the dst field is specified and the rule field is not, it is
    implementation-defined when the changes to and from DST occur.

musl seems to interpret `TZ=EST5EDT` as having DST always in effect,
causing the tests that rely on the glibc behavior (of defaulting to
America/New_York transition rules) to fail.
---
 tests/printf3.sub | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/printf3.sub b/tests/printf3.sub
index 4c54aa12..c5132530 100644
--- a/tests/printf3.sub
+++ b/tests/printf3.sub
@@ -16,7 +16,7 @@ LANG=C
 
 SHELLSTART=$(date +%s)
 SECS=1275250155
-export TZ=EST5EDT
+export TZ=EST5EDT,M3.2.0/2,M11.1.0/2
 
 case $SHELLSTART in
 *s*)   SHELLSTART=$EPOCHSECONDS ; DATESECS=false ;;    # take a shot
-- 
2.45.2