tests: fix a typo

vlib/v/checker/tests/inout/void_fn_as_value.out

@@ -1,4 +1,4 @@
-vlib/v/checker/tests/inout/void_fn_as_value.v:5:8: error: unknown funciton: x
+vlib/v/checker/tests/inout/void_fn_as_value.v:5:8: error: unknown function: x
     3| fn main() {
     4|   mut a := 'aa'
     5|   a += x('a','b')

vlib/v/gen/x64/tests/x64_test.v

@@ -4,7 +4,7 @@ import term
 
 // TODO some logic copy pasted from valgrind_test.v and compiler_test.v, move to a module
 fn test_x64() {
-	if false && os.user_os() != 'linux' {
+	if os.user_os() != 'linux' {
 		eprintln('x64 tests can only be run on Linux for now.')
 		exit(0)
 	}