More std lib fixes

Just selecting the same codepath as other BSD's for the most part.

core/c/libc/stdio.odin

@@ -83,7 +83,7 @@ when ODIN_OS == .Linux {
 	}
 }
 
-when ODIN_OS == .OpenBSD {
+when ODIN_OS == .OpenBSD || ODIN_OS == .NetBSD {
 	fpos_t :: distinct i64
 
 	_IOFBF :: 0

core/net/dns.odin

@@ -30,7 +30,7 @@ when ODIN_OS == .Windows {
 		resolv_conf        = "",
 		hosts_file         = "%WINDIR%\\system32\\drivers\\etc\\hosts",
 	}
-} else when ODIN_OS == .Linux || ODIN_OS == .Darwin || ODIN_OS == .OpenBSD {
+} else when ODIN_OS == .Linux || ODIN_OS == .Darwin || ODIN_OS == .OpenBSD || ODIN_OS == .NetBSD {
 	DEFAULT_DNS_CONFIGURATION :: DNS_Configuration{
 		resolv_conf        = "/etc/resolv.conf",
 		hosts_file         = "/etc/hosts",
@@ -854,4 +854,4 @@ parse_response :: proc(response: []u8, filter: DNS_Record_Type = nil, allocator
 	}
 
 	return _records[:], true
-}
+}

core/prof/spall/spall_unix.odin

@@ -1,5 +1,5 @@
 //+private
-//+build darwin, freebsd, openbsd
+//+build darwin, freebsd, openbsd, netbsd
 package spall
 
 // Only for types.

core/sys/info/cpu_intel.odin

@@ -67,7 +67,7 @@ init_cpu_features :: proc "c" () {
 	try_set(&set, .os_xsave,  27, ecx1)
 	try_set(&set, .rdrand,    30, ecx1)
 
-	when ODIN_OS == .FreeBSD || ODIN_OS == .OpenBSD {
+	when ODIN_OS == .FreeBSD || ODIN_OS == .OpenBSD || ODIN_OS == .NetBSD {
 		// xgetbv is an illegal instruction under FreeBSD 13 & OpenBSD 7.1
 		// return before probing further
 		cpu_features = set
@@ -133,4 +133,4 @@ init_cpu_name :: proc "c" () {
 		brand = brand[:len(brand) - 1]
 	}
 	cpu_name = brand
-}
+}