[mips] Move setDescriptionString to base class MipsTargetInfoBase and call it
at the end of handleTargetFeatures.

No intended functionality change.


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@193636 91177308-0d34-0410-b5e6-96231b3b80d8
[mips] Use the distance between the current argument's starting address and
the previous argument's ending address to compute the type of the padding
argument.

No intended functionality change.


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@193638 91177308-0d34-0410-b5e6-96231b3b80d8