package/erofs-utils: bump version to 1.2.1

package/erofs-utils: bump version to 1.2.1

- minor maintainence release mainly to address exist build issues;
- remove the following patches since all have been upstreamed:
    0001-erofs-utils-fix-multiple-definition-of-sbi.patch;
    0002-erofs-utils-fuse-fix-linking-when-using-with-selinux.patch;
    0003-erofs-utils-fuse-disable-backtrace-if-unsupported.patch.

Signed-off-by: Gao Xiang <hsiangkao@aol.com>
[yann.morin.1998@free.fr: two spaces in hash file]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>