Update to libc 0.2.126, which has the definition of GRND_INSECURE.

Author: sunfishcode

Cargo.toml

@@ -40,15 +40,15 @@ once_cell = { version = "1.5.2", optional = true }
 [target.'cfg(all(not(rustix_use_libc), not(miri), target_os = "linux", any(target_arch = "x86", all(target_arch = "x86_64", target_pointer_width = "64"), all(target_endian = "little", any(target_arch = "arm", all(target_arch = "aarch64", target_pointer_width = "64"), target_arch = "powerpc64", target_arch = "riscv64", target_arch = "mips", target_arch = "mips64")))))'.dependencies]
 linux-raw-sys = { version = "0.0.46", default-features = false, features = ["general", "errno", "ioctl", "no_std"] }
 libc_errno = { package = "errno", version = "0.2.8", default-features = false, optional = true }
-libc = { version = "0.2.118", features = ["extra_traits"], optional = true }
+libc = { version = "0.2.126", features = ["extra_traits"], optional = true }
 
 # Dependencies for platforms where only libc is supported:
 #
 # On all other Unix-family platforms, and under Miri, we always use the libc
 # backend, so enable its dependencies unconditionally.
 [target.'cfg(any(rustix_use_libc, miri, not(all(target_os = "linux", any(target_arch = "x86", all(target_arch = "x86_64", target_pointer_width = "64"), all(target_endian = "little", any(target_arch = "arm", all(target_arch = "aarch64", target_pointer_width = "64"), target_arch = "powerpc64", target_arch = "riscv64", target_arch = "mips", target_arch = "mips64")))))))'.dependencies]
 libc_errno = { package = "errno", version = "0.2.8", default-features = false }
-libc = { version = "0.2.118", features = ["extra_traits"] }
+libc = { version = "0.2.126", features = ["extra_traits"] }
 
 # Additional dependencies for Linux with the libc backend:
 #
@@ -69,7 +69,7 @@ features = [
 
 [dev-dependencies]
 tempfile = "3.2.0"
-libc = "0.2.118"
+libc = "0.2.126"
 libc_errno = { package = "errno", version = "0.2.8" }
 io-lifetimes = { version = "0.7.0", default-features = false }
 # Don't upgrade to serial_test 0.7 for now because it depends on a