Remove core:os dependency for base:runtime

core/mem/virtual/virtual_darwin.odin

@@ -2,7 +2,7 @@
 //+private
 package mem_virtual
 
-foreign import libc "System.framework"
+foreign import libc "system:System.framework"
 import "core:c"
 
 PROT_NONE  :: 0x0 /* [MC2] no permissions */

core/os/os_darwin.odin

@@ -1,8 +1,8 @@
 package os
 
 foreign import dl   "system:dl"
-foreign import libc "System.framework"
-foreign import pthread "System.framework"
+foreign import libc "system:System.framework"
+foreign import pthread "system:System.framework"
 
 import "base:runtime"
 import "core:strings"

core/path/filepath/path_unix.odin

@@ -2,7 +2,7 @@
 package filepath
 
 when ODIN_OS == .Darwin {
-	foreign import libc "System.framework"
+	foreign import libc "system:System.framework"
 } else {
 	foreign import libc "system:c"
 }

core/sync/futex_darwin.odin

@@ -5,7 +5,7 @@ package sync
 import "core:c"
 import "core:time"
 
-foreign import System "System.framework"
+foreign import System "system:System.framework"
 
 foreign System {
 	// __ulock_wait is not available on 10.15

core/sync/primitives_darwin.odin

@@ -5,7 +5,7 @@ package sync
 import "core:c"
 import "base:intrinsics"
 
-foreign import pthread "System.framework"
+foreign import pthread "system:System.framework"
 
 _current_thread_id :: proc "contextless" () -> int {
 	tid: u64

core/sys/darwin/mach_darwin.odin

@@ -1,6 +1,6 @@
 package darwin
 
-foreign import pthread "System.framework"
+foreign import pthread "system:System.framework"
 
 import "core:c"
 

core/sys/unix/pthread_darwin.odin

@@ -86,7 +86,7 @@ PTHREAD_CANCEL_DISABLE      :: 1
 PTHREAD_CANCEL_DEFERRED     :: 0
 PTHREAD_CANCEL_ASYNCHRONOUS :: 1
 
-foreign import pthread "System.framework"
+foreign import pthread "system:System.framework"
 
 @(default_calling_convention="c")
 foreign pthread {

core/sys/unix/time_unix.odin

@@ -2,7 +2,7 @@
 package unix
 
 when ODIN_OS == .Darwin {
-	foreign import libc "System.framework"
+	foreign import libc "system:System.framework"
 } else  {
 	foreign import libc "system:c"
 }

core/time/tsc_darwin.odin

@@ -4,7 +4,7 @@ package time
 
 import "core:c"
 
-foreign import libc "System.framework"
+foreign import libc "system:System.framework"
 foreign libc {
 	@(link_name="sysctlbyname") _sysctlbyname    :: proc(path: cstring, oldp: rawptr, oldlenp: rawptr, newp: rawptr, newlen: int) -> c.int ---
 }