Fixes #8386
We should check if BR_CROSS_PATH_ABS is defined, not if it evalutates to
true for the pre processor.
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
        /* Fill in the relative paths */
 #ifdef BR_CROSS_PATH_REL
        ret = snprintf(path, sizeof(path), "%s/" BR_CROSS_PATH_REL "/%s", absbasedir, basename);
-#elif BR_CROSS_PATH_ABS
+#elif defined(BR_CROSS_PATH_ABS)
        ret = snprintf(path, sizeof(path), BR_CROSS_PATH_ABS "/%s", basename);
 #else /* BR_CROSS_PATH_SUFFIX */
        ret = snprintf(path, sizeof(path), "%s/usr/bin/%s" BR_CROSS_PATH_SUFFIX, absbasedir, basename);