Enable set_file_mtime test.

Here since 2014, just not enabled.
Fix test data and test itself.

regress/Makefile.am

diff --git a/regress/Makefile.am b/regress/Makefile.am
index 891f4e0..c7d3897 100644
--- a/regress/Makefile.am
+++ b/regress/Makefile.am
@@ -265,6 +265,7 @@
 	set_compression_store_to_deflate.test \
 	set_compression_store_to_store.test \
 	set_compression_unknown.test \
+	set_file_mtime.test \
 	stat_index_cp437_guess.test \
 	stat_index_cp437_raw.test \
 	stat_index_cp437_strict.test \

regress/set_file_mtime.test

diff --git a/regress/set_mtime.test b/regress/set_file_mtime.test
similarity index 67%
rename from regress/set_mtime.test
rename to regress/set_file_mtime.test
index c80fe4b..477fd06 100644
--- a/regress/set_mtime.test
+++ b/regress/set_file_mtime.test
@@ -1,4 +1,4 @@
 # change mtime in a zip archive
 return 0
-args testfile set_mtime 0 1407272201
+args testfile set_file_mtime 0 1407272201
 file testfile testfile.zip testfile2014.zip

regress/testfile2014.zip

diff --git a/regress/testfile2014.zip b/regress/testfile2014.zip
index 1d91853..1d75d46 100644
--- a/regress/testfile2014.zip
+++ b/regress/testfile2014.zip
Binary files differ