build: Create .la library for bitcoincrypto
build: Create .la library for bitcoincrypto

Libtool will yell at you if you try to link a shared library against
static ones.

This change creates a libtool archive library for bitcoincrypto and
allows a shared library to be linked against it portably.

Also specify -static in both:

- ..._la_CXXFLAGS so that libtool will avoid building two versions of
  each object (one PIC, one non-PIC). We just need the one that is
  suitable for static linking.
- ..._la_LDFLAGS so that libtool will create a static library.

[META] This change is done in preparation for a future commit where we
       link the libbitcoinkernel library against this one.

sstone/bitcoin,fujicoin/fujicoin,AkioNak/bitcoin,kallewoof/bitcoin,particl/particl-core,particl/particl-core,domob1812/bitcoin,sstone/bitcoin,kallewoof/bitcoin,fanquake/bitcoin,sstone/bitcoin,sipsorcery/bitcoin,namecoin/namecore,fanquake/bitcoin,anditto/bitcoin,particl/particl-core,GroestlCoin/bitcoin,bitcoin/bitcoin,fujicoin/fujicoin,fanquake/bitcoin,anditto/bitcoin,namecoin/namecore,bitcoin/bitcoin,jlopp/statoshi,anditto/bitcoin,sipsorcery/bitcoin,instagibbs/bitcoin,sstone/bitcoin,GroestlCoin/GroestlCoin,namecoin/namecoin-core,instagibbs/bitcoin,andreaskern/bitcoin,domob1812/bitcoin,mruddy/bitcoin,andreaskern/bitcoin,instagibbs/bitcoin,bitcoinsSG/bitcoin,sipsorcery/bitcoin,jlopp/statoshi,jlopp/statoshi,instagibbs/bitcoin,andreaskern/bitcoin,kallewoof/bitcoin,namecoin/namecoin-core,jamesob/bitcoin,jlopp/statoshi,lateminer/bitcoin,bitcoinsSG/bitcoin,jamesob/bitcoin,jambolo/bitcoin,AkioNak/bitcoin,tecnovert/particl-core,mruddy/bitcoin,domob1812/bitcoin,ajtowns/bitcoin,jlopp/statoshi,fanquake/bitcoin,domob1812/bitcoin,sstone/bitcoin,GroestlCoin/bitcoin,sipsorcery/bitcoin,kallewoof/bitcoin,Xekyo/bitcoin,kallewoof/bitcoin,fujicoin/fujicoin,sipsorcery/bitcoin,GroestlCoin/GroestlCoin,anditto/bitcoin,GroestlCoin/GroestlCoin,sstone/bitcoin,mruddy/bitcoin,mruddy/bitcoin,ajtowns/bitcoin,jamesob/bitcoin,lateminer/bitcoin,jamesob/bitcoin,andreaskern/bitcoin,GroestlCoin/bitcoin,GroestlCoin/bitcoin,anditto/bitcoin,Xekyo/bitcoin,jamesob/bitcoin,bitcoinsSG/bitcoin,jambolo/bitcoin,namecoin/namecore,andreaskern/bitcoin,ajtowns/bitcoin,fanquake/bitcoin,namecoin/namecore,domob1812/bitcoin,tecnovert/particl-core,domob1812/bitcoin,jamesob/bitcoin,lateminer/bitcoin,fujicoin/fujicoin,GroestlCoin/bitcoin,Xekyo/bitcoin,bitcoin/bitcoin,fujicoin/fujicoin,lateminer/bitcoin,lateminer/bitcoin,mruddy/bitcoin,bitcoinsSG/bitcoin,GroestlCoin/bitcoin,ajtowns/bitcoin,ajtowns/bitcoin,tecnovert/particl-core,bitcoin/bitcoin,jambolo/bitcoin,namecoin/namecoin-core,AkioNak/bitcoin,particl/particl-core,bitcoinsSG/bitcoin,AkioNak/bitcoin,Xekyo/bitcoin,particl/particl-core,jambolo/bitcoin,GroestlCoin/GroestlCoin,bitcoin/bitcoin,instagibbs/bitcoin,AkioNak/bitcoin,bitcoin/bitcoin,namecoin/namecoin-core,tecnovert/particl-core,jlopp/statoshi,fanquake/bitcoin,bitcoinsSG/bitcoin,namecoin/namecoin-core,namecoin/namecore,jambolo/bitcoin,particl/particl-core,AkioNak/bitcoin,mruddy/bitcoin,Xekyo/bitcoin,jambolo/bitcoin,Xekyo/bitcoin,andreaskern/bitcoin,ajtowns/bitcoin,namecoin/namecoin-core,sipsorcery/bitcoin,lateminer/bitcoin,tecnovert/particl-core,kallewoof/bitcoin,GroestlCoin/GroestlCoin,tecnovert/particl-core,fujicoin/fujicoin,instagibbs/bitcoin,namecoin/namecore,anditto/bitcoin,GroestlCoin/GroestlCoin