ENH: Fix building with cmake version 2.8.9
The format caused a nesting and list with the extra quotes that resulted in a parsing error where an extraneous ';'
-- verifying file... file='Slicer-git-itkv4/CTKAPPLAUNCHER-prefix/src/CTKAppLauncher-0.1.7-macosx-amd64.tar.gz' -- verifying file... warning: did not verify file - no URL_MD5 checksum argument? corrupt file? -- extracting... src='Slicer-git-itkv4/CTKAPPLAUNCHER-prefix/src/CTKAppLauncher-0.1.7-macosx-amd64.tar.gz' dst='Slicer-git-itkv4/CTKAPPLAUNCHER;' -- extracting... [tar xfz] CMake Error at CTKAPPLAUNCHER-prefix/src/CTKAPPLAUNCHER-stamp/extract-CTKAPPLAUNCHER.cmake:26 (execute_process): execute_process given unknown argument /../ex-CTKAPPLAUNCHER1239.
make[2]: *** [CTKAPPLAUNCHER-prefix/src/CTKAPPLAUNCHER-stamp/CTKAPPLAUNCHER-download] Error 1 make[1]: *** [CMakeFiles/CTKAPPLAUNCHER.dir/all] Error 2 make: *** [all] Error 2