linux: add GRND_INSECURE constant

This is available on kernels ≥5.6.

Author: zx2c4

src/unix/linux_like/android/mod.rs

@@ -1792,6 +1792,7 @@ pub const NETLINK_GET_STRICT_CHK: ::c_int = 12;
 
 pub const GRND_NONBLOCK: ::c_uint = 0x0001;
 pub const GRND_RANDOM: ::c_uint = 0x0002;
+pub const GRND_INSECURE: ::c_uint = 0x0004;
 
 pub const SECCOMP_MODE_DISABLED: ::c_uint = 0;
 pub const SECCOMP_MODE_STRICT: ::c_uint = 1;

src/unix/linux_like/linux/mod.rs

@@ -1781,6 +1781,7 @@ pub const PR_SET_VMA_ANON_NAME: ::c_int = 0;
 
 pub const GRND_NONBLOCK: ::c_uint = 0x0001;
 pub const GRND_RANDOM: ::c_uint = 0x0002;
+pub const GRND_INSECURE: ::c_uint = 0x0004;
 
 pub const SECCOMP_MODE_DISABLED: ::c_uint = 0;
 pub const SECCOMP_MODE_STRICT: ::c_uint = 1;