fuchsia add getrandom equivalent zx_cprng_draw.

Author: devnexen

libc-test/semver/fuchsia.txt

@@ -1370,3 +1370,6 @@ utimensat
 vhangup
 vmsplice
 waitid
+zx_cprng_add_entropy
+zx_cprng_draw
+zx_status_t

src/fuchsia/mod.rs

@@ -89,6 +89,8 @@ pub type rlim_t = ::c_ulonglong;
 pub type c_long = i64;
 pub type c_ulong = u64;
 
+pub type zx_status_t = i32;
+
 // FIXME: why are these uninhabited types? that seems... wrong?
 // Presumably these should be `()` or an `extern type` (when that stabilizes).
 #[cfg_attr(feature = "extra_traits", derive(Debug))]
@@ -4228,6 +4230,9 @@ extern "C" {
         >,
         data: *mut ::c_void,
     ) -> ::c_int;
+
+    pub fn zx_cprng_draw(buffer: *mut ::c_void, buffer_size: ::size_t);
+    pub fn zx_cprng_add_entropy(buffer: *const ::c_void, buffer_size: ::size_t) -> ::zx_status_t;
 }
 
 cfg_if! {