Update xz.cmake

Author: alexmercerind

packages/xz.cmake

@@ -3,7 +3,7 @@ ExternalProject_Add(xz
     SOURCE_DIR ${SOURCE_LOCATION}
     GIT_CLONE_FLAGS ""
     UPDATE_COMMAND ""
-    GIT_RESET 18b845e # v5.4.1
+    GIT_TAG v5.4.1
     CONFIGURE_COMMAND ${EXEC} CONF=1 autoreconf -fi && <SOURCE_DIR>/configure
         --host=${TARGET_ARCH}
         --prefix=${MINGW_INSTALL_PREFIX}