package/xenomai: fix indentation (tabs instead of spaces)

check-package warns:
package/xenomai/Config.in:86: continuation line should be indented using tabs

Fixes: e4040d0d8 "package/xenomai: rework custom handling".

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/xenomai/Config.in

@@ -83,7 +83,7 @@ config BR2_PACKAGE_XENOMAI_VERSION
 	string
 	default "3.0.10" if BR2_PACKAGE_XENOMAI_LATEST_VERSION
 	default BR2_PACKAGE_XENOMAI_CUSTOM_VERSION_VALUE \
-                if BR2_PACKAGE_XENOMAI_CUSTOM_VERSION
+		if BR2_PACKAGE_XENOMAI_CUSTOM_VERSION
 	default "custom" if BR2_PACKAGE_XENOMAI_CUSTOM_TARBALL
 	default BR2_PACKAGE_XENOMAI_REPOSITORY_VERSION \
 		if BR2_PACKAGE_XENOMAI_CUSTOM_GIT