acpisrc: remove pointless assignment

Removes pointless assignment in AsTrimWhitespace().

ACPICA BZ 1120. Reported by Dean Nelson <dnelson@redhat.com>
Signed-off-by: David E. Box <david.e.box@linux.intel.com>
disassembler: Fix potential for seg fault

A portion of AdAmlDisassemble() assumes that 'File' is non-NULL, when in fact
that assumption can only be made if the first arg to AdAmlDisassemble(), as in
'OutToFile', is TRUE. And currently this is the case, as the only caller to this
function is AslDoDisassembly(), passing as a first arg 'AslToFile', which is
initialized to TRUE (and never changed). But should that ever not be the case,
the result could be a segmentation fault. Dean Nelson

Applied patch from Dean Nelson, <dnelson@redhat.com>, to check that File
exists before reading. ACPICA BZ 1124.

Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Unix makefiles: Separate option to disable optimizations and _FORTIFY_SOURCE

This change removes the _FORTIFY_SOURCE flag from the NOOPT disable option and
creates a separate flag (NOFORTIFY) for this purpose. Some toolchains may
define _FORTIFY_SOURCE which leads redefined errors when building ACPICA. This
allows disabling the option without also having to disable optimazations.

ACPICA BZ 1127. Reported by Alan Stone <ahs3@redhat.com>
Signed-off-by: David E. Box <david.e.box@linux.intel.com>