common/os: ensure command buffer is large enough (fix gcc warnings)

[ColinIanKing]

Make command buffer large enough, fixes gcc 8.2 warnings:

common/os/os_util.c: In function ‘os_sysfs_cmt_task_set’: common/os/os_util.c:781:45: warning: ‘%s’ directive output may be truncated writing up to 127 bytes into a region of size 121 [-Wformat-truncation=] snprintf(command, sizeof(command), "rm -rf %s 2>/dev/null", path); ^~ ~~~~

common/os/os_util.c:785:44: warning: ‘%s’ directive output may be truncated writing up to 127 bytes into a region of size 122 [-Wformat-truncation=] snprintf(command, sizeof(command), "mkdir %s 2>/dev/null", path); ^~ ~~~~

common/os/os_util.c:794:15: warning: ‘%s’ directive output may be truncated writing up to 127 bytes into a region of size between 109 and 119 [-Wformat-truncation=]

"echo %d > %s/tasks", lwpid, path);
           ^~                ~~~~

common/os/os_util.c:791:15: warning: ‘%s’ directive output may be truncated writing up to 127 bytes into a region of size between 109 and 119 [-Wformat-truncation=]

"echo %d > %s/tasks", pid, path);
           ^~              ~~~~

In file included from /usr/include/stdio.h:862, from common/os/os_util.c:33:

Signed-off-by: Colin Ian King colin.king@canonical.com

[ColinIanKing]

Any updates on this pull request?