build-tools: Update flex to 2.6.4

Change-Id: Ia37ed54a5c87c8cb517992936f7c1d963bd55951
Signed-off-by: mydongistiny <jaysonedson@gmail.com>
Signed-off-by: shagbag913 <sh4gbag913@gmail.com>
1 file changed
tree: 4bc28d0172924b0d4d9e8e72f6a4c74ce484d226
  1. common/
  2. darwin-x86/
  3. linux-x86/
  4. build-prebuilts.sh
  5. manifest.xml
  6. OWNERS