Ensure that dtoolutil/dtoolbase get built statically by CMake.

dtool/src/dtoolbase/Sources.cmake

@@ -66,7 +66,7 @@ foreach(FILENAME IN LISTS P3DTOOLBASE_SOURCE_FILES)
 	set(P3DTOOLBASE_SOURCES ${P3DTOOLBASE_SOURCES} ${CMAKE_CURRENT_LIST_DIR}/${FILENAME})
 endforeach()
 
-add_library(p3dtoolbase
+add_library(p3dtoolbase STATIC
 	${P3DTOOLBASE_INSTALL_HEADERS}
 	${P3DTOOLBASE_SOURCES}
 )

dtool/src/dtoolutil/Sources.cmake

@@ -62,7 +62,7 @@ foreach(FILENAME IN LISTS P3DTOOLUTIL_SOURCE_FILES)
 	set(P3DTOOLUTIL_SOURCES ${P3DTOOLUTIL_SOURCES} ${CMAKE_CURRENT_LIST_DIR}/${FILENAME})
 endforeach()
 
-add_library(p3dtoolutil
+add_library(p3dtoolutil STATIC
 	${P3DTOOLUTIL_INSTALL_HEADERS}
 	${P3DTOOLUTIL_SOURCES}
 )