Fixed wrong numbers in mutation stats

[ScarKy0]

Pull request was made because some of the mutation statistics had incorrect numbers, resulting in them having either no impact or too much impact, which was answered to not be intended by a developer

Due to rimworld not using percentages in some of those statistics these may not be accurate to the balance update

Changes:

• Wild Bovine Horn, Movement Speed +20%
• Avian Eye, Shooting Hit Factor +5/7.5/10
• Fox Tail Paragon, Filth -10
• Fox Tail Paragon, Arrest +20%
• Reptile Eye, Melee Hit +10
• Elephant Trunk, Melee Hit +4/5
• Thick Arm, Melee Hit +4
• Flightless Wing, Melee Hit +2
• Felis Parts Tail, Pawn Beauty +1
• Lacertelia Parts, Tail Shooting Hit +2/4
• Cobra Parts Tail, Shooting Hit +2
• Testudinidae Tail, Shooting Hit +2/4
• Massive Hoof, Melee Hit +2
• Trotter, Cook Speed +2/4
• Huge Paw, Melee Hit +2
• Clawed hand, Melee Hit +1