dropbear: Do not build scp

Building scp as part of dropbear causes it to conflict with openssh.

packages/dropbear/Makefile.in.patch

@@ -1,12 +0,0 @@
-diff -uNr dropbear-2018.76/Makefile.in dropbear-2018.76.mod/Makefile.in
---- dropbear-2018.76/Makefile.in	2018-02-27 16:25:10.000000000 +0200
-+++ dropbear-2018.76.mod/Makefile.in	2018-04-21 14:05:03.923792282 +0300
-@@ -9,7 +9,7 @@
- # dbclient functionality, and includes the progress-bar functionality in scp.
- 
- ifndef PROGRAMS
--	PROGRAMS=dropbear dbclient dropbearkey dropbearconvert
-+	PROGRAMS=dropbear dbclient dropbearkey dropbearconvert scp
- endif
- 
- STATIC_LTC=libtomcrypt/libtomcrypt.a