compiler/natives/src/bytes: Skip all tests that rely on syscall.Getpa…

…gesize.

Fixes:

	--- FAIL: TestIndexByteNearPageBoundary (0.00s)
		Error: runtime error: native function not implemented: syscall.Getpagesize
	FAIL	bytes	19.341s

compiler/natives/src/bytes/bytes_test.go

@@ -6,6 +6,8 @@ import (
 	"testing"
 )
 
-func TestEqualNearPageBoundary(t *testing.T) {
-	t.Skip()
+func dangerousSlice(t *testing.T) []byte {
+	t.Skip("dangerousSlice relies on syscall.Getpagesize, which GopherJS doesn't implement")
+
+	panic("unreachable")
 }