Update smtp.gmail.com fingerprint
Update smtp.gmail.com fingerprint

Google rotated their cert recently - from looking at my OSSEC testing
emails, it looks like it happened on or around 3/18.

micahflee/securedrop,GabeIsman/securedrop,ehartsuyker/securedrop,ageis/securedrop,heartsucker/securedrop,pwplus/securedrop,heartsucker/securedrop,kelcecil/securedrop,pwplus/securedrop,jeann2013/securedrop,conorsch/securedrop,kelcecil/securedrop,jeann2013/securedrop,conorsch/securedrop,heartsucker/securedrop,kelcecil/securedrop,harlo/securedrop,garrettr/securedrop,GabeIsman/securedrop,jrosco/securedrop,kelcecil/securedrop,micahflee/securedrop,GabeIsman/securedrop,kelcecil/securedrop,chadmiller/securedrop,pwplus/securedrop,garrettr/securedrop,ehartsuyker/securedrop,garrettr/securedrop,jaseg/securedrop,jrosco/securedrop,jaseg/securedrop,micahflee/securedrop,ehartsuyker/securedrop,jrosco/securedrop,harlo/securedrop,jaseg/securedrop,jeann2013/securedrop,harlo/securedrop,GabeIsman/securedrop,harlo/securedrop,heartsucker/securedrop,chadmiller/securedrop,chadmiller/securedrop,chadmiller/securedrop,jaseg/securedrop,kelcecil/securedrop,ehartsuyker/securedrop,GabeIsman/securedrop,jeann2013/securedrop,jrosco/securedrop,jrosco/securedrop,conorsch/securedrop,pwplus/securedrop,ageis/securedrop,pwplus/securedrop,chadmiller/securedrop,ageis/securedrop,ehartsuyker/securedrop,jaseg/securedrop,harlo/securedrop,jeann2013/securedrop,ehartsuyker/securedrop,jeann2013/securedrop,jaseg/securedrop,ageis/securedrop,chadmiller/securedrop,harlo/securedrop,conorsch/securedrop,pwplus/securedrop,micahflee/securedrop,conorsch/securedrop,heartsucker/securedrop,jrosco/securedrop,garrettr/securedrop,GabeIsman/securedrop