syntax/sh.syntax (part2): trivial: highlight 'unset', 'read', 'export' as keywords

Synced mentioned in 9dda06f48937014947433bc5ea97a6dc73299924 keywords to other contexts.

Signed-off-by: Sergei Trofimovich <slyfox@inbox.ru>

syntax/ebuild.syntax

@@ -349,11 +349,13 @@ wholechars abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-._
     keyword whole else yellow
     keyword whole esac yellow
     keyword whole exit yellow
+    keyword whole export yellow
     keyword whole fi yellow
     keyword whole for yellow
     keyword whole getopts       yellow
     keyword whole if yellow
     keyword whole in yellow
+    keyword whole read yellow
     keyword whole return yellow
     keyword whole select yellow
     keyword whole shift yellow
@@ -361,6 +363,7 @@ wholechars abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-._
     keyword whole then yellow
     keyword whole trap yellow
     keyword whole until yellow
+    keyword whole unset yellow
     keyword whole wait          yellow
     keyword whole while yellow
 

syntax/sh.syntax

@@ -57,11 +57,13 @@ wholechars abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-._
     keyword whole else yellow
     keyword whole esac yellow
     keyword whole exit yellow
+    keyword whole export yellow
     keyword whole fi yellow
     keyword whole for yellow
     keyword whole getopts       yellow
     keyword whole if yellow
     keyword whole in yellow
+    keyword whole read yellow
     keyword whole return yellow
     keyword whole select yellow
     keyword whole shift yellow
@@ -69,6 +71,7 @@ wholechars abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-._
     keyword whole then yellow
     keyword whole trap yellow
     keyword whole until yellow
+    keyword whole unset yellow
     keyword whole wait yellow
     keyword whole while yellow