Ignore readelf's return value.

PR:		251110 (with style fixes)
Submitted by:	John Hein

Mk/Scripts/qa.sh

@@ -211,7 +211,7 @@ stripped() {
 	# files with spaces are kept intact.
 	# Using readelf -h ... /ELF Header:/ will match on all ELF files.
 	find ${STAGEDIR} -type f ! -name '*.a' ! -name '*.o' \
-	    -exec readelf -S {} + 2>/dev/null | awk '
+	    -exec sh -c 'readelf -S -- /dev/null "$@" || :' -- {} + 2>/dev/null | awk '
 	    /File:/ {sub(/File: /, "", $0); file=$0}
 	    /[[:space:]]\.debug_info[[:space:]]*PROGBITS/ {print file}' |
 	    while read -r f; do