rpi-userland: .mk: Indent rules with tabs

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/rpi-userland/rpi-userland.mk

@@ -14,7 +14,7 @@ RPI_USERLAND_CONF_OPT = -DVMCS_INSTALL_PREFIX=/usr
 RPI_USERLAND_PROVIDES = libegl libgles libopenmax libopenvg
 
 define RPI_USERLAND_POST_TARGET_CLEANUP
-    rm -Rf $(TARGET_DIR)/usr/src
+	rm -Rf $(TARGET_DIR)/usr/src
 endef
 RPI_USERLAND_POST_INSTALL_TARGET_HOOKS += RPI_USERLAND_POST_TARGET_CLEANUP