unix: Enable uos.VfsLfs1, uos.VfsLfs2 on coverage build.

ports/unix/Makefile

@@ -257,6 +257,7 @@ coverage:
 	    -Wold-style-definition -Wpointer-arith -Wshadow -Wuninitialized -Wunused-parameter \
 	    -DMICROPY_UNIX_COVERAGE' \
 	    LDFLAGS_EXTRA='-fprofile-arcs -ftest-coverage' \
+	    MICROPY_VFS_LFS=1 \
 	    FROZEN_MANIFEST=manifest_coverage.py \
 	    BUILD=build-coverage PROG=micropython_coverage
 

ports/unix/moduos_vfs.c

@@ -30,6 +30,7 @@
 #include "extmod/vfs.h"
 #include "extmod/vfs_posix.h"
 #include "extmod/vfs_fat.h"
+#include "extmod/vfs_lfs.h"
 
 #if MICROPY_VFS
 
@@ -71,6 +72,10 @@ STATIC const mp_rom_map_elem_t uos_vfs_module_globals_table[] = {
     #if MICROPY_VFS_FAT
     { MP_ROM_QSTR(MP_QSTR_VfsFat), MP_ROM_PTR(&mp_fat_vfs_type) },
     #endif
+    #if MICROPY_VFS_LFS
+    { MP_ROM_QSTR(MP_QSTR_VfsLfs1), MP_ROM_PTR(&mp_type_vfs_lfs1) },
+    { MP_ROM_QSTR(MP_QSTR_VfsLfs2), MP_ROM_PTR(&mp_type_vfs_lfs2) },
+    #endif
 };
 
 STATIC MP_DEFINE_CONST_DICT(uos_vfs_module_globals, uos_vfs_module_globals_table);