STRIP_MASK is not documented in PMS, so avoid using it.
Also further simplify QA variables.
Package-Manager: portage-2.3.0_p16
DEPEND+=" !!=media-libs/freetype-2.5.4"
-STRIP_MASK="*/grub/*/*.{mod,img}"
-RESTRICT="test"
+RESTRICT="strip test"
-QA_EXECSTACK="usr/bin/grub*-emu* usr/lib*/grub/*"
-QA_WX_LOAD="usr/lib*/grub/*"
-QA_MULTILIB_PATHS="usr/lib.*/grub/.*"
-QA_PRESTRIPPED="usr/lib.*/grub/.*"
+QA_EXECSTACK="usr/bin/grub*-emu* usr/lib/grub/*"
+QA_WX_LOAD="usr/lib/grub/*"
+QA_MULTILIB_PATHS="usr/lib/grub/.*"
src_unpack() {
if [[ ${PV} == 9999 ]]; then