Filesystem : move crc files to shared folder

Moved crc32.c, CRCTable.cpp, CRCTable.h from ext2, and crc_table.c from the UDF filesystem to shared directory

Modified Jam files to use these files from shared directory for ext2 and UDF filesystem

Change-Id: Ie2c79ce0a3ec7d1ea497e725a288c31528dcaa86
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5343
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>