I had the same issue. I am also running Matlab R2017b on Manjaro Linux with kernel 4.15.12-. This seems to solve the problem in my case:
1) Install the libselinux package from AUR
2) exclud libfreetype* files
sudo mv matlabroot/bin/glnxa64/libfreetype* exclude_path
3) run "! matlabroot/bin/glnxa64/MATLABWindow" as in simulink issues. I got the 2 error code with the proposed solution: "Set aside MATLAB’s copy of the libglib-2.0.so library, located in matlabroot/cefclient/sys/os/glnxa64".
sudo mv matlabroot/cefclient/sys/os/glnxa64/libglib-2.0.so* exclude_path
I executed "! matlabroot/bin/glnxa64/MATLABWindow" once more but the matlab terminal showed only errors. I do not recommend that ;). However, I am able to run simulink and run simulations without errors or warnings so far. Until now, everything seems to work fine :).