refactor: correct wrong cfg value && remove ones that do not exist

Author: SteveLauC

build.rs

@@ -26,4 +26,15 @@ fn main() {
         netbsdlike: { any(netbsd, openbsd) },
         solarish: { any(illumos, solaris) },
     }
+
+    // Below are Nix's custom cfg values that we need to let the compiler know
+    println!("cargo:rustc-check-cfg=cfg(apple_targets)");
+    println!("cargo:rustc-check-cfg=cfg(bsd)");
+    println!("cargo:rustc-check-cfg=cfg(bsd_without_apple)");
+    println!("cargo:rustc-check-cfg=cfg(linux_android)");
+    println!("cargo:rustc-check-cfg=cfg(freebsdlike)");
+    println!("cargo:rustc-check-cfg=cfg(netbsdlike)");
+    println!("cargo:rustc-check-cfg=cfg(solarish)");
+    println!("cargo:rustc-check-cfg=cfg(fbsd14)");
+    println!("cargo:rustc-check-cfg=cfg(qemu)");
 }

src/sys/signal.rs

@@ -597,7 +597,7 @@ impl SigSet {
         target_os = "haiku",
         target_os = "hurd",
         target_os = "aix",
-        target_os = "fushsia"
+        target_os = "fuchsia"
     ))]
     #[doc(alias("sigsuspend"))]
     pub fn suspend(&self) -> Result<()> {

test/sys/test_signal.rs

@@ -350,7 +350,7 @@ fn test_sigwait() {
     target_os = "haiku",
     target_os = "hurd",
     target_os = "aix",
-    target_os = "fushsia"
+    target_os = "fuchsia"
 ))]
 #[test]
 fn test_sigsuspend() {

test/test.rs

@@ -15,7 +15,7 @@ mod test_fcntl;
 mod test_kmod;
 #[cfg(any(
     freebsdlike,
-    target_os = "fushsia",
+    target_os = "fuchsia",
     target_os = "linux",
     target_os = "netbsd"
 ))]

test/test_fcntl.rs

@@ -13,7 +13,6 @@ use nix::fcntl::{openat2, OpenHow, ResolveFlag};
     target_env = "gnu",
     any(
         target_arch = "x86_64",
-        target_arch = "x32",
         target_arch = "powerpc",
         target_arch = "s390x"
     )
@@ -146,7 +145,6 @@ fn test_renameat() {
     target_env = "gnu",
     any(
         target_arch = "x86_64",
-        target_arch = "x32",
         target_arch = "powerpc",
         target_arch = "s390x"
     )
@@ -190,7 +188,6 @@ fn test_renameat2_behaves_like_renameat_with_no_flags() {
     target_env = "gnu",
     any(
         target_arch = "x86_64",
-        target_arch = "x32",
         target_arch = "powerpc",
         target_arch = "s390x"
     )
@@ -238,7 +235,6 @@ fn test_renameat2_exchange() {
     target_env = "gnu",
     any(
         target_arch = "x86_64",
-        target_arch = "x32",
         target_arch = "powerpc",
         target_arch = "s390x"
     )