Switch strip test to using readelf(1) instead of file(1) to identify symbols.

This has been slightly faster in my tests since readelf(1) will fail on the
file much quicker if it doesn't find the ELF headers.  This also more directly
finds the symbol table.

With hat:	portmgr

Mk/Scripts/qa.sh

@@ -173,15 +173,13 @@ stripped() {
 	[ -n "${STRIP}" ] || return 0
 	# Split file and result into 2 lines and read separately to ensure
 	# files with spaces are kept intact.
-	find ${STAGEDIR} -type f \
-	    -exec /usr/bin/file --exclude ascii -nNF "${LF}" {} + |
+	# Using readelf -h ... /ELF Header:/ will match on all ELF files.
+	find ${STAGEDIR} -type f ! -name '*.a' \
+	    -exec readelf -S {} + 2>/dev/null | awk '\
+	    /File:/ {sub(/File: /, "", $0); file=$0} \
+	    /SYMTAB/ {print file}' |
 	    while read f; do
-		    read output
-		case "${output}" in
-			*ELF\ *\ executable,\ *FreeBSD*,\ not\ stripped*|*ELF\ *\ shared\ object,\ *FreeBSD*,\ not\ stripped*)
-				warn "'${f#${STAGEDIR}${PREFIX}/}' is not stripped consider trying INSTALL_TARGET=install-strip or using \${STRIP_CMD}"
-				;;
-		esac
+		warn "'${f#${STAGEDIR}${PREFIX}/}' is not stripped consider trying INSTALL_TARGET=install-strip or using \${STRIP_CMD}"
 	done
 }