Remove unneeded bootimage properties

These were added as part of http://r.android.com/731514, but
most of these properties make no sense for the bootimage. Revert
to only defining date, date.utc and fingerprint.

Bug: 131066061
Test: inspect vendor/build.prop
Test: boot, no SELinux warnings for removed props
Change-Id: Ibbeff9870a5b71e83c2cceeb1327b12600077b23

core/Makefile

@@ -504,7 +504,9 @@ endif
 	$(hide) echo "#" >> $@; \
 	        echo "# BOOTIMAGE_BUILD_PROPERTIES" >> $@; \
 	        echo "#" >> $@;
-	$(hide) $(call generate-common-build-props,bootimage,$@)
+	$(hide) echo ro.bootimage.build.date=`$(DATE_FROM_FILE)`>>$@
+	$(hide) echo ro.bootimage.build.date.utc=`$(DATE_FROM_FILE) +%s`>>$@
+	$(hide) echo ro.bootimage.build.fingerprint="$(BUILD_FINGERPRINT_FROM_FILE)">>$@
 	$(hide) echo "#" >> $@; \
 	        echo "# ADDITIONAL VENDOR BUILD PROPERTIES" >> $@; \
 	        echo "#" >> $@;