flex: update to 2.6.4
tree861fde564adea971269b52578b8742bc8cc94c3e
-rw-r--r-- 1308 .gitignore
-rw-r--r-- 1139 .travis.yml
-rw-r--r-- 17987 COPYING
-rw-r--r-- 3661 Config.in
-rw-r--r-- 1273 LICENCE
-rw-r--r-- 564 Makefile
-rw-r--r-- 5652 Makefile.adk
-rw-r--r-- 917 README
-rw-r--r-- 766 THANKS
drwxr-xr-x - adk
drwxr-xr-x - docs
drwxr-xr-x - mk
drwxr-xr-x - package
-rw-r--r-- 5614 rules.mk
drwxr-xr-x - scripts
drwxr-xr-x - target
drwxr-xr-x - tasks
drwxr-xr-x - toolchain