.run_cpack doesn't iterate properly to sub projects.

[bulldogc]

Version

0.18.1

OS Version

Other (please specify in the bug description)

Describe the bug

At the end of .run_cpack the code is doing a cd $build_dir/$val, this changes the dir for the duration of the script and causes a failure to run cpack on the full list of packages.
Change this cd to a pushd and add a popd to the bottem of that if block to correct this.

I am seeing this with 0.18.1 on ubuntu 18 currently but the file seems to be the same in the latest version so this is likely still a problem.

To Reproduce

Execute
catkin build -DCMAKE_BUILD_TYPE=Release -DTESSERACT_PACKAGE=ON;
./src/tesseract/.run-cpack

from the catkin workspace folder.

Expected behavior

cpack gets run on all the packages in StringArray but instead only runs on the first and then cant find any other folders.

Relevant log output

[marip8]

@Levi-Armstrong is the .run-cpack script still relevant? I see in the CI job we're running CPack directly in the build sub-directory for each package rather than using this script

[Levi-Armstrong]

Kinda, more for those that want to run cpack locally but it is likely not kept up to date because it is not used in CI.