Linking, mingw: Add bcrypt to libraries linked to libcommon.

It is already added with MSVC, and must be added with gcc/mingw

However, the cmake option:
add_definitions( -DBOOST_UUID_FORCE_AUTO_LINK )
does not work on msys2 (at least with my cmake version), so another syntax is used.

CMakeLists.txt

@@ -389,6 +389,9 @@ if( CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang" )
         # API with respect to the C99 standard, so make sure we force it to use its own compliant
         # snprintf
         add_definitions(-D__USE_MINGW_ANSI_STDIO=1)
+        
+        # Allow linking for Boost for the UUID against bcrypt
+        set( EXTRA_LIBS "bcrypt" )
 
     elseif( NOT APPLE )
         # Thou shalt not link vaporware and tell us it's a valid DSO (apple ld doesn't support it)

common/CMakeLists.txt

@@ -417,6 +417,7 @@ target_link_libraries( common
     ${CURL_LIBRARIES}
     ${OPENSSL_LIBRARIES}        # empty on Apple
     ${wxWidgets_LIBRARIES}
+    ${EXTRA_LIBS}
     )
 
 target_include_directories( common PUBLIC