Reuse the definition of $usbdropdir to define the default value of ccidtwindir
Reuse the definition of $usbdropdir to define the default value of
ccidtwindir

It is important if --enable-usbdropdir=DIR is used and
`$PKG_CONFIG libpcsclite --variable=usbdropdir` should then not be used.


git-svn-id: d8b078d517c8be834637447f210d7177f0fa38d6@5715 0ce88b0d-b2fd-0310-8134-9614164e65ea

hiranotaka/ccid-scr331-nttcom,hiranotaka/ccid-scr331-nttcom,hiranotaka/ccid-scr331-nttcom,LudovicRousseau/CCID,LudovicRousseau/CCID,hiranotaka/ccid-scr331-nttcom,LudovicRousseau/CCID