build: Create .la library for crc32c
build: Create .la library for crc32c

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

This change creates a libtool archive library for crc32c 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.

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