fs_config: add comment to header

Add a comment to android_filesystem_config.h
about AID and OEM Range "scraping" done by
build/tools/fs_config.

Test: Build and boot.

Change-Id: I2d4845d91546ae967a1ee5166b73d119938faccc
Signed-off-by: William Roberts <william.c.roberts@intel.com>
1 file changed