Touch the donwload files to change the modified time (#10929)

Why I did it
It is to improve the build performance, when building multiple targets.
The modified time of downloaded files should be not older than the file .platform.
If not, the file will be downloaded again, when building any dependent targets.

How I did it
When downloading the packages from web site, the modified time will be changed by the command "touch".

src/sonic-fips/Makefile

@@ -24,6 +24,7 @@ $(addprefix $(DEST)/, $(MAIN_TARGET)): $(DEST)/% :
 	  url=$(FIPS_URL_PREFIX)/$$filename
 	  mkdir -p "$$(dirname $(DEST)/$$target)"
 	  wget -O "$(DEST)/$$target" "$$url"
+	  touch "$(DEST)/$$target"
 	done
 
 $(addprefix $(DEST)/, $(FIPS_DERIVED_TARGET)): $(DEST)/% : $(DEST)/$(MAIN_TARGET)