fix deadlock when in write_errno_to_parent_and_abort state

core/os/os2/process_linux.odin

@@ -523,7 +523,7 @@ _process_start :: proc(desc: Process_Desc) -> (process: Process, err: Error) {
 		write_errno_to_parent_and_abort :: proc(parent_fd: linux.Fd, errno: linux.Errno) -> ! {
 			error_byte: [1]u8 = { u8(errno) }
 			linux.write(parent_fd, error_byte[:])
-			intrinsics.trap()
+			linux.exit(126)
 		}
 
 		stdin_fd: linux.Fd

core/os/os2/process_posix.odin

@@ -163,7 +163,7 @@ _process_start :: proc(desc: Process_Desc) -> (process: Process, err: Error) {
 			#assert(len(posix.Errno) < max(u8))
 			errno := u8(posix.errno())
 			posix.write(parent_fd, &errno, 1)
-			runtime.trap()
+			posix.exit(126)
 		}
 
 		null := posix.open("/dev/null", {.RDWR})