ext4-new-features: fix syntax error in configure

In configure, string comparison is done using double assignment.
/bin/sh doesn't allow to compare strings using "==".
So "==" is modified to "=".

Signed-off-by: Honggyu Kim <hong.gyu.kim@lge.com>
Reviewed-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
kernel/connectors: TCONF vs TBROK, and fix check for root

Fixed check for root the same way as in
08dcfbb5a4ebad9319c54935a600ab936708c6da.

If the test is run on unsupported kernels it
should return TCONF, not TBROK. Fixed this.

Signed-off-by: Stanislav Kholmanskikh <stanislav.kholmanskikh@oracle.com>
Reviewed-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>