make bootstrap fails when trying to install TrezorCrypto

[ungaro]

[!] Error installing TrezorCrypto
[!] /usr/local/bin/git clone https://github.com/TrustWallet/trezor-crypto-ios.git /var/folders/ns/yr1rlh7x2xx2dqj48whw2yth0000gn/T/d20180808-80288-jy168e --template= --single-branch --depth 1 --branch 0.0.6

Cloning into '/var/folders/ns/yr1rlh7x2xx2dqj48whw2yth0000gn/T/d20180808-80288-jy168e'...
remote: Repository not found.
fatal: repository 'https://github.com/TrustWallet/trezor-crypto-ios.git/' not found

make: *** [install] Error 1

https://github.com/TrustWallet/trezor-crypto-ios.git/ seems to be broken.

[solrex]

@ungaro Temporary workaround:

pod 'TrezorCrypto', :podspec => 'https://github.com/solrex/trezor-crypto-ios/raw/master/TrezorCrypto.podspec'