Bump bundled libarchive version to 3.5.2

- Update bunlded libarchive version used on Windows/Mac
- Enable requested zstd support while we are at it. Closes #211

dependencies/libarchive-3.5.2/tar/CMakeLists.txt

@@ -0,0 +1,50 @@
+############################################
+#
+# How to build bsdtar
+#
+############################################
+IF(ENABLE_TAR)
+
+  SET(bsdtar_SOURCES
+    bsdtar.c
+    bsdtar.h
+    bsdtar_platform.h
+    cmdline.c
+    creation_set.c
+    read.c
+    subst.c
+    util.c
+    write.c
+    ../libarchive_fe/err.c
+    ../libarchive_fe/err.h
+    ../libarchive_fe/lafe_platform.h
+    ../libarchive_fe/line_reader.c
+    ../libarchive_fe/line_reader.h
+    ../libarchive_fe/passphrase.c
+    ../libarchive_fe/passphrase.h
+  )
+  INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR}/../libarchive_fe)
+  IF(WIN32 AND NOT CYGWIN)
+    LIST(APPEND bsdtar_SOURCES bsdtar_windows.c)
+    LIST(APPEND bsdtar_SOURCES bsdtar_windows.h)
+  ENDIF(WIN32 AND NOT CYGWIN)
+
+  # bsdtar documentation
+  SET(bsdtar_MANS bsdtar.1)
+
+  # How to build bsdtar
+  ADD_EXECUTABLE(bsdtar ${bsdtar_SOURCES})
+  IF(ENABLE_TAR_SHARED)
+    TARGET_LINK_LIBRARIES(bsdtar archive ${ADDITIONAL_LIBS})
+  ELSE(ENABLE_TAR_SHARED)
+    TARGET_LINK_LIBRARIES(bsdtar archive_static ${ADDITIONAL_LIBS})
+    SET_TARGET_PROPERTIES(bsdtar PROPERTIES COMPILE_DEFINITIONS
+    				 LIBARCHIVE_STATIC)
+  ENDIF(ENABLE_TAR_SHARED)
+
+  # Installation rules
+  INSTALL(TARGETS bsdtar RUNTIME DESTINATION bin)
+  INSTALL_MAN(${bsdtar_MANS})
+ENDIF(ENABLE_TAR)
+
+add_subdirectory(test)