Update libm, add rint and rintf

Author: Jules-Bertholet

compiler-builtins/libm

@@ -1 +1 @@
-Subproject commit 14a76eaf8dab437e92c5fc505c48fb4ed0eb3483
+Subproject commit 4c8a973741c014b11ce7f1477693a3e5d4ef9609

compiler-builtins/src/math.rs

@@ -46,6 +46,8 @@ no_mangle! {
     fn fmaxf(x: f32, y: f32) -> f32;
     fn round(x: f64) -> f64;
     fn roundf(x: f32) -> f32;
+    fn rint(x: f64) -> f64;
+    fn rintf(x: f32) -> f32;
     fn sin(x: f64) -> f64;
     fn pow(x: f64, y: f64) -> f64;
     fn powf(x: f32, y: f32) -> f32;
@@ -65,20 +67,6 @@ no_mangle! {
     fn ldexpf(f: f32, n: i32) -> f32;
     fn tgamma(x: f64) -> f64;
     fn tgammaf(x: f32) -> f32;
-}
-
-#[cfg(any(
-    all(
-        target_family = "wasm",
-        target_os = "unknown",
-        not(target_env = "wasi")
-    ),
-    target_os = "xous",
-    all(target_arch = "x86_64", target_os = "uefi"),
-    all(target_arch = "xtensa", target_os = "none"),
-    all(target_vendor = "fortanix", target_env = "sgx")
-))]
-no_mangle! {
     fn atan(x: f64) -> f64;
     fn atan2(x: f64, y: f64) -> f64;
     fn cosh(x: f64) -> f64;