make TS_IDENTIFIER be a substructure of TS_TYPED
gcc/
* tree.h (struct tree_identifier): Inherit from tree_typed, not
tree_common.
(HT_IDENT_TO_GCC_IDENT): Adjust for said change.
* tree.c (initialize_tree_contains_struct): Mark TS_IDENTIFIER as
TS_BASE instead of TS_COMMON.
* varasm.c (assemble_name): Remove assert.
gcc/c-family/
* c-common.h (struct c_common_identifier): Inherit from tree_typed,
not tree_common.