Fix CMake build (#173)

* Fix CMake build after Swissmap addition

`absl::container` library now contains source files so needs to be
respectively built for CMake as well.

Switches `absl::container` from being a header library to a source
library.

* Add raw_hash_set_test to CMake test build

absl/container/CMakeLists.txt

@@ -47,10 +47,11 @@ list(APPEND CONTAINER_INTERNAL_HEADERS
   "internal/unordered_set_modifiers_test.h"
 )
 
-
+absl_library(
-absl_header_library(
   TARGET
     absl_container
+  SOURCES
+    "internal/raw_hash_set.cc"
   EXPORT_NAME
     container
 )
@@ -164,3 +165,11 @@ absl_test(
 )
 
 
+absl_test(
+  TARGET
+    raw_hash_set_test
+  SOURCES
+    "internal/raw_hash_set_test.cc"
+  PUBLIC_LIBRARIES
+    absl::base absl::hash absl_throw_delegate test_instance_tracker_lib
+)