Add -Ofast optimization option

Change-Id: Iba50c27114e98bd442ae7a058ebf801171fa4a09
Signed-off-by: Josue Rivera <prbassplayer@gmail.com>
Remove ffast-math gcc flag

  * -ffast-math is redundant when using Ofast
     as its the same as -O3 and -ffast-math

Change-Id: Idbb5ca2b422e638b7926d494133b5e7316d2cb4d
Signed-off-by: Josue Rivera <prbassplayer@gmail.com>