tests: Move test.h include

BUG=None
BRANCH=None
TEST=None

Change-Id: I8e0611c415c921f5b04b20270fb26e147fefd1b8
Signed-off-by: Evan Benn <evanbenn@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/69537
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>

tests/io_mock.h

@@ -31,6 +31,8 @@
 #ifndef _IO_MOCK_H_
 #define _IO_MOCK_H_
 
+#include <include/test.h>
+
 /* Required for `FILE *` */
 #include <stdio.h>