Linux 3.19 syscall changes

Syscall changes in Linux 3.19 compared with 3.18: 1 added, 0 removed.

This is also the first release scanned for nios2, so syscalls that were already there are not listed as new.

Added in Linux 3.19

SYSCALLDESCRIPTIONARCHITECTURES AND NUMBERS
execveat execute program relative to a directory file descriptor x64 322 x86 358 arm64 281 ia32 358 x32 1073742369 arc 281 hexagon 281 openrisc 281

Same data from the API: https://api.syscall.sh/v2/diff/3.18/3.19