linux: add PTRACE_GETSIGMASK and PTRACE_SETSIGMASK

Author: mbyzhang

libc-test/semver/linux.txt

@@ -1888,6 +1888,7 @@ PTRACE_EVENT_VFORK_DONE
 PTRACE_GETEVENTMSG
 PTRACE_GETREGSET
 PTRACE_GETSIGINFO
+PTRACE_GETSIGMASK
 PTRACE_INTERRUPT
 PTRACE_KILL
 PTRACE_LISTEN
@@ -1913,6 +1914,7 @@ PTRACE_SEIZE
 PTRACE_SETOPTIONS
 PTRACE_SETREGSET
 PTRACE_SETSIGINFO
+PTRACE_SETSIGMASK
 PTRACE_SINGLESTEP
 PTRACE_SYSCALL
 PTRACE_TRACEME

src/unix/linux_like/linux/gnu/mod.rs

@@ -853,6 +853,8 @@ pub const PTRACE_SEIZE: ::c_uint = 0x4206;
 pub const PTRACE_INTERRUPT: ::c_uint = 0x4207;
 pub const PTRACE_LISTEN: ::c_uint = 0x4208;
 pub const PTRACE_PEEKSIGINFO: ::c_uint = 0x4209;
+pub const PTRACE_GETSIGMASK: ::c_uint = 0x420a;
+pub const PTRACE_SETSIGMASK: ::c_uint = 0x420b;
 pub const PTRACE_GET_SYSCALL_INFO: ::c_uint = 0x420e;
 pub const PTRACE_SYSCALL_INFO_NONE: ::__u8 = 0;
 pub const PTRACE_SYSCALL_INFO_ENTRY: ::__u8 = 1;