ACPICA build: Include "makefile.config" in all source code packages.

This file was missing in all of the acpica source code packages because
it starts with a lower case m instead of upper case.
Disassembler: fix issues with CondRefOf() operator.

It is important to not attempt to emit an external for the target
of a CondRefOf. Otherwise, references to this target symbol may
get confused, especially if the target is actually a control method.
ACPICA BZ 988.
iASL: Fix a couple of possible memory leaks during pathname processing.

Couple of leaks in the error paths for AcpiFlSplitInputPathname.
ACPICA BZ 1046. Colin Ian King (colin.king@canonical.com).