Update mime-types.properties list with some more languages

Bug: Issue 8564
Change-Id: Ia9ea39c9d21341e13ef1da4a7713e5288dbadeaa
diff --git a/resources/com/google/gerrit/server/mime/mime-types.properties b/resources/com/google/gerrit/server/mime/mime-types.properties
index 996e8a4..a83dffb 100644
--- a/resources/com/google/gerrit/server/mime/mime-types.properties
+++ b/resources/com/google/gerrit/server/mime/mime-types.properties
@@ -123,6 +123,7 @@
 mbox = application/mbox
 md = text/x-markdown
 mirc = text/mirc
+mjs = text/x-mjs
 mkd = text/x-markdown
 ml = text/x-ocaml
 mli = text/x-ocaml
@@ -145,11 +146,13 @@
 p = text/x-pascal
 pas = text/x-pascal
 patch = text/x-diff
+pcss = text/x-pcss
 pgp = application/pgp
 php = text/x-php
 php3 = text/x-php
 php4 = text/x-php
 php5 = text/x-php
+php7 = text/x-php
 phtml = text/x-php
 pig = text/x-pig
 pl = text/x-perl