[flang] Clean up includes

indirection.h: Doesn't need ../common because it is in common.

expression.h: ../lib is the wrong path but the includes are needed.
They were probably coming in indirectly through other includes.

token-parsers.h: Include was not needed and parser shouldn't have
dependency on evaluate.

Original-commit: flang-compiler/f18@86f6b0023d8a72fd7ccf32b1754b5544b52d22ba
Reviewed-on: https://github.com/flang-compiler/f18/pull/405