tests: check for wipefs and helpers in fdisk tests

Signed-off-by: Karel Zak <kzak@redhat.com>

tests/ts/fdisk/bsd

@@ -23,6 +23,7 @@ TS_DESC="nested BSD"
 ts_init "$*"
 
 ts_check_test_command "$TS_CMD_FDISK"
+ts_check_test_command "$TS_HELPER_SYSINFO"
 
 FDISK_CMD_CREATE_DOSLABEL="o\n"              # create dos label
 FDISK_CMD_SETID="x\ni\n0x1\nr\n"             # set non-random ID

tests/ts/sfdisk/dos

@@ -22,6 +22,7 @@ TS_DESC="MBR"
 ts_init "$*"
 
 ts_check_test_command "$TS_CMD_FDISK"
+ts_check_test_command "$TS_CMD_WIPEFS"
 
 ts_skip_nonroot