xf86-input-mouse 1.9.4

• Update configure.ac bug URL for gitlab migration
• Build xz tarballs instead of bzip2
• Fix spelling/wording issues
• gitlab CI: add a basic build test
• gitlab CI: stop requiring Signed-off-by in commits
• sun_mouse: Fix -Wsign-compare warnings
• sun_mouse: Fix -Wnull-dereference warning
• checkForErraticMovements: Fix -Wempty-body warnings
• SetupMouse: fix -Wsign-compare warning
• InputDriverRec: Fix -Wmissing-field-initializers warning
• autoGood: quiet -Wimplicit-fallthrough warning
• configure: check for timingsafe_memcmp