tiff: use correct construct to override target installation

We also remove the stripping, as it is already done globally.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/tiff/tiff.mk

@@ -17,10 +17,8 @@ TIFF_CONF_OPT = \
 
 TIFF_DEPENDENCIES = host-pkg-config zlib jpeg
 
-$(eval $(call AUTOTARGETS,package,tiff))
-
-$(TIFF_TARGET_INSTALL_TARGET):
-	-cp -a $(TIFF_DIR)/libtiff/.libs/libtiff.so* $(TARGET_DIR)/usr/lib/
-	$(STRIPCMD) $(STRIP_STRIP_UNNEEDED) $(TARGET_DIR)/usr/lib/libtiff.so
-	touch $@
+define TIFF_INSTALL_TARGET_CMDS
+	-cp -a $(@D)/libtiff/.libs/libtiff.so* $(TARGET_DIR)/usr/lib/
+endef
 
+$(eval $(call AUTOTARGETS,package,tiff))