Add autogen.sh in ARM Cross-compilation
Add autogen.sh in ARM Cross-compilation

autogen for the config files was missing.

Github-Pull: #14276
Rebased-From: 52beb9ed8876e3129360197ac632c1b59f910c55

guncoin/guncoin,vertcoin/vertcoin,guncoin/guncoin,gjhiggins/vcoincore,vmp32k/litecoin,ahmedbodi/vertcoin,lbryio/lbrycrd,GroestlCoin/bitcoin,GroestlCoin/bitcoin,BTCGPU/BTCGPU,GroestlCoin/GroestlCoin,ahmedbodi/vertcoin,GroestlCoin/bitcoin,lbryio/lbrycrd,qtumproject/qtum,vmp32k/litecoin,BTCGPU/BTCGPU,BTCGPU/BTCGPU,guncoin/guncoin,vertcoin/vertcoin,vmp32k/litecoin,ahmedbodi/vertcoin,lbryio/lbrycrd,lbryio/lbrycrd,vertcoin/vertcoin,ahmedbodi/vertcoin,BTCGPU/BTCGPU,thrasher-/litecoin,gjhiggins/vcoincore,BTCGPU/BTCGPU,vertcoin/vertcoin,digibyte/digibyte,thrasher-/litecoin,digibyte/digibyte,qtumproject/qtum,GroestlCoin/GroestlCoin,digibyte/digibyte,thrasher-/litecoin,gjhiggins/vcoincore,h4x3rotab/BTCGPU,ahmedbodi/vertcoin,h4x3rotab/BTCGPU,h4x3rotab/BTCGPU,GroestlCoin/bitcoin,BTCGPU/BTCGPU,GroestlCoin/GroestlCoin,lbryio/lbrycrd,GroestlCoin/GroestlCoin,qtumproject/qtum,digibyte/digibyte,vmp32k/litecoin,qtumproject/qtum,gjhiggins/vcoincore,GroestlCoin/GroestlCoin,guncoin/guncoin,vmp32k/litecoin,digibyte/digibyte,lbryio/lbrycrd,vmp32k/litecoin,guncoin/guncoin,qtumproject/qtum,ahmedbodi/vertcoin,GroestlCoin/bitcoin,qtumproject/qtum,vertcoin/vertcoin,h4x3rotab/BTCGPU,GroestlCoin/bitcoin,digibyte/digibyte,vertcoin/vertcoin,thrasher-/litecoin,gjhiggins/vcoincore,h4x3rotab/BTCGPU,h4x3rotab/BTCGPU,guncoin/guncoin,gjhiggins/vcoincore,qtumproject/qtum,thrasher-/litecoin,GroestlCoin/GroestlCoin,thrasher-/litecoin,lbryio/lbrycrd