build: Install suppressions files

This installs the suppressions files for Valgrind and LSan, in
/usr/share/gjs-1.0/valgrind/gjs.supp and
/usr/share/gjs-1.0/lsan/lsan.supp.

Closes #2.
4 jobs for 2-install-suppressions-file in 23 minutes and 1 second (queued for 15 minutes and 9 seconds)
Status Job ID Name Coverage
  Build
passed #6174
fedora_clang

00:12:12

passed #6175
fedora_cppcheck

00:00:26

passed #6173
fedora_gcc

00:10:22

 
  Failure
skipped #6176
on_failure