scan.mk: do not silence output of dump phase

Make it easier to spot currently hidden issues:

 $ make defconfig V=sc
 ...
 Collecting target info: target/linux/airohabash: -c: line 1: syntax error near unexpected token `|'
 bash: -c: line 1: `echo 1686815253<LINUX_VERMAGIC> | staging_dir/host/bin/mkhash md5 | cut -b1-8'
 bash: -c: line 1: syntax error near unexpected token `|'
 bash: -c: line 1: `echo 1686815253<LINUX_VERMAGIC> | staging_dir/host/bin/mkhash md5 | sed -E 's/(.{8})(.{4})(.{4})(.{4})(.{10})../\1-\2-\3-\4-\500/''
 ...

Signed-off-by: Petr Štetiar <ynezz@true.cz>

include/scan.mk

@@ -50,7 +50,8 @@ define PackageDir
 		$$(call progress,Collecting $(SCAN_NAME) info: $(SCAN_DIR)/$(2)) \
 		echo Source-Makefile: $(SCAN_DIR)/$(2)/Makefile; \
 		$(if $(3),echo Override: $(3),true); \
-		$(NO_TRACE_MAKE) --no-print-dir -r DUMP=1 FEED="$(call feedname,$(2))" -C $(SCAN_DIR)/$(2) $(SCAN_MAKEOPTS) 2>/dev/null || { \
+		$(if $(findstring c,$(OPENWRT_VERBOSE)),$(MAKE),$(NO_TRACE_MAKE) --no-print-dir) -r DUMP=1 FEED="$(call feedname,$(2))" -C $(SCAN_DIR)/$(2) $(SCAN_MAKEOPTS) \
+			$(if $(findstring c,$(OPENWRT_VERBOSE)),,2>/dev/null) || { \
 			mkdir -p "$(TOPDIR)/logs/$(SCAN_DIR)/$(2)"; \
 			$(NO_TRACE_MAKE) --no-print-dir -r DUMP=1 FEED="$(call feedname,$(2))" -C $(SCAN_DIR)/$(2) $(SCAN_MAKEOPTS) > $(TOPDIR)/logs/$(SCAN_DIR)/$(2)/dump.txt 2>&1; \
 			$$(call progress,ERROR: please fix $(SCAN_DIR)/$(2)/Makefile - see logs/$(SCAN_DIR)/$(2)/dump.txt for details\n) \