Fix nasty --setperms/--setugids regression in 4.14.2 (RhBug: 1640470)

Commit 38c2f6e causes --setperms and
--setugids follow symlinks instead of skipping them.

In case of --setperms, all encountered symlinks will have their
target file/directory permissions set to the 0777 of the link itself
(so world writable etc but suid/sgid stripped), temporarily or permanently,
depending on whether the symlink occurs before or after it's target in the
package file list. When the link occurs before its target, there's a short
window where the target is world writable before having it's permissions
reset to original, making it particularly bad for suid/sgid binaries.

--setugids is similarly affected with link targets owner/group changing
to that of the symlink.

Add missing parentheses to the conditions introduced in commit
38c2f6e to fix.
Reported by Karel Srot, patch by Pavlina Moravcova Varekova.

rpmpopt.in

@@ -44,14 +44,14 @@ rpm	alias --scripts --qf '\
 	--POPTdesc=$"list install/erase scriptlets from package(s)"
 
 rpm	alias --setperms -q --qf '[\[ -L %{FILENAMES:shescape} \] || \
-        \[ $((%{FILEFLAGS} & 2#1001000)) != 0 \] && \[ ! -e %{FILENAMES:shescape} \] || \
+        ( \[ $((%{FILEFLAGS} & 2#1001000)) != 0 \] && \[ ! -e %{FILENAMES:shescape} \] ) || \
         chmod %7{FILEMODES:octal} %{FILENAMES:shescape}\n]' \
 		   --pipe "grep -v \(none\) | grep '^. -L ' | sed 's/chmod .../chmod /' | sh" \
 	--POPTdesc=$"set permissions of files in a package"
 
 rpm	alias --setugids -q --qf \
 	'[ch %{FILEUSERNAME:shescape} %{FILEGROUPNAME:shescape} %{FILENAMES:shescape} %{FILEFLAGS}\n]' \
-	--pipe "(echo 'ch() { \[ $(($4 & 2#1001000)) != 0 \] && \[ ! -e \"$3\" \] || \
+	--pipe "(echo 'ch() { ( \[ $(($4 & 2#1001000)) != 0 \] && \[ ! -e \"$3\" \] ) || \
 		(chown -h -- \"$1\" \"$3\";chgrp -h -- \"$2\" \"$3\";) }'; \
 		grep '^ch '|grep -v \(none\))|sh" \
 	--POPTdesc=$"set user/group ownership of files in a package"