Merge #170: cmake: Amend bitcoin_consensus library

67f5198 fixup! cmake: Build `bitcoin_consensus` library (Hennadii Stepanov)

Pull request description:

  Separated sources have not been needed since libbitcoinconsencus was removed.

  Required for #157.

Top commit has no ACKs.

Tree-SHA512: c4f391f439a7401771152ce5efee54c4b85b2ae879af95a66bc06e902a86a254defcf83526b1d778a3f523886076906382020f9a0f024d666f13195ea52b8547

Author: hebasto

src/CMakeLists.txt

@@ -40,8 +40,8 @@ if(MULTIPROCESS)
 endif()
 
 
-add_library(bitcoin_consensus_sources INTERFACE)
-target_sources(bitcoin_consensus_sources INTERFACE
+# Stable, backwards-compatible consensus functionality.
+add_library(bitcoin_consensus STATIC EXCLUDE_FROM_ALL
   arith_uint256.cpp
   consensus/merkle.cpp
   consensus/tx_check.cpp
@@ -55,14 +55,9 @@ target_sources(bitcoin_consensus_sources INTERFACE
   uint256.cpp
   util/strencodings.cpp
 )
-
-# Stable, backwards-compatible consensus functionality
-# also exposed as a shared library or a static one.
-add_library(bitcoin_consensus STATIC EXCLUDE_FROM_ALL)
 target_link_libraries(bitcoin_consensus
   PRIVATE
     core_interface
-    bitcoin_consensus_sources
     bitcoin_crypto
     secp256k1
 )