File dont-drop-Groups.patch of Package rpmdevtools

Index: rpmdevtools-8.3/rpmdev-newspec.in
===================================================================
--- rpmdevtools-8.3.orig/rpmdev-newspec.in
+++ rpmdevtools-8.3/rpmdev-newspec.in
@@ -240,7 +240,12 @@ fi
 if [[ $rpmver -ge 40600 ]] ; then # >= 4.6
     # filter BuildRoot and Group tags
     specfilter+="
-    s/^(BuildRoot|Group)[ \\t]*:[^\\n]*\\n//IMg
+    s/^BuildRoot[ \\t]*:[^\\n]*\\n//IMg
+"
+fi
+if [ -n "$appname" ] ; then
+    specfilter+="
+    s/\[spectemplate\]/$appname/
 "
 fi
 if [[ $rpmver -ge 40800 ]] ; then # >= 4.8