Fix compilation with -DBUILD_SHARED_LIBS=ON

Add STATIC keyword to add_library() calls

src/box/CMakeLists.txt

@@ -17,7 +17,7 @@ add_custom_target(box_generate_lua_sources
     DEPENDS ${lua_sources})
 set_property(DIRECTORY PROPERTY ADDITIONAL_MAKE_CLEAN_FILES ${lua_sources})
 
-add_library(box
+add_library(box STATIC
     iproto.cc
     iproto_constants.c
     iproto_port.cc

src/lib/salad/CMakeLists.txt

 set(lib_sources rope.c rtree.c guava.c)
 set_source_files_compile_flags(${lib_sources})
-add_library(salad ${lib_sources})
+add_library(salad STATIC ${lib_sources})