aarch64, or1k: define rseq syscall number following linux v4.19

added in linux commit db7a2d1809a5b6b08d138ff68837f805fc073351

arch/aarch64/bits/syscall.h.in

@@ -275,4 +275,5 @@
 #define __NR_pkey_free 290
 #define __NR_statx 291
 #define __NR_io_pgetevents 292
+#define __NR_rseq 293
 

arch/or1k/bits/syscall.h.in

@@ -277,4 +277,5 @@
 #define __NR_pkey_free 290
 #define __NR_statx 291
 #define __NR_io_pgetevents 292
+#define __NR_rseq 293