executor: manually define struct fsxattr

It should be in <linux/fs.h> but is not there on some distros/arches as expected.

Travis build fails with:

      		<stdin>: In function ‘remove_dir’:
        		<stdin>:152:13: error: variable ‘attr’ has initializer but incomplete type
        		<stdin>:152:13: error: excess elements in struct initializer [-Werror]
        		<stdin>:152:13: error: (near initialization for ‘attr’) [-Werror]
        		<stdin>:152:21: error: storage size of ‘attr’ isn’t known
        		<stdin>:153:20: error: ‘FS_IOC_FSSETXATTR’ undeclared (first use in this function)
        		<stdin>:153:20: note: each undeclared identifier is reported only once for each function it appears in
        		<stdin>:152:21: error: unused variable ‘attr’ [-Werror=unused-variable]
        		cc1: all warnings being treated as errors

https://travis-ci.org/google/syzkaller/jobs/413574080

0 files changed, 0 insertions, 0 deletions