libpng: remove libpng*-config scripts from TARGET_DIR

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

package/libpng/libpng.mk

@@ -22,5 +22,14 @@ endef
 
 LIBPNG_POST_INSTALL_STAGING_HOOKS += LIBPNG_STAGING_LIBPNG12_CONFIG_FIXUP
 
+define LIBPNG_REMOVE_CONFIG_SCRIPTS
+	$(RM) -f $(TARGET_DIR)/usr/bin/libpng$(LIBPNG_SERIES)-config \
+		 $(TARGET_DIR)/usr/bin/libpng-config
+endef
+
+ifneq ($(BR2_HAVE_DEVFILES),y)
+LIBPNG_POST_INSTALL_TARGET_HOOKS += LIBPNG_REMOVE_CONFIG_SCRIPTS
+endif
+
 $(eval $(call AUTOTARGETS,package,libpng))
 $(eval $(call AUTOTARGETS,package,libpng,host))