patch 8.2.2794: Linux users don't know how to get ncurses

Problem:    Linux users don't know how to get ncurses.
Solution:   Add the name of the package. (closes #8132)
diff --git a/src/configure.ac b/src/configure.ac
index 8be5972..657cc97 100644
--- a/src/configure.ac
+++ b/src/configure.ac
@@ -3482,6 +3482,7 @@
 	AC_MSG_RESULT(yes),
 	AC_MSG_ERROR([NOT FOUND!
       You need to install a terminal library; for example ncurses.
+      On Linux that would be the libncurses-dev package.
       Or specify the name of the library with --with-tlib.]))
 fi