test: Move more tests to libc-test/tests

Use autodetection for more tests that don't need a harness.

(backport <#4574>)
(cherry picked from commit 196f0ab)

Author: tgross35

libc-test/Cargo.toml

@@ -65,31 +65,11 @@ name = "linux-termios"
 path = "test/linux_termios.rs"
 harness = false
 
-[[test]]
-name = "makedev"
-path = "test/makedev.rs"
-harness = true
-
-[[test]]
-name = "errqueue"
-path = "test/errqueue.rs"
-harness = true
-
-[[test]]
-name = "sigrt"
-path = "test/sigrt.rs"
-harness = true
-
 [[test]]
 name = "semver"
 path = "test/semver.rs"
 harness = false
 
-[[test]]
-name = "primitive_types"
-path = "test/primitive_types.rs"
-harness = true
-
 [[test]]
 name = "style"
 path = "test/check_style.rs"