menuselect: Add menuselect to Asterisk trunk (Patch 1)

This is the first patch that adds menuselect to Asterisk trunk, and removes
the svn:externals property. This is being done for two reasons:
(1) The removal of external repositories eases a future migration to git
(2) Asterisk is now the only thing that uses menuselect; as a result, there's
    little need to keep it in an external repository

Subsequent patches will remove the mxml dependency from menuselect and tidy
up the build system.

ASTERISK-20703


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@418832 65c4cc65-6c06-0410-ace0-fbb531ad65f3

menuselect/test/build_tools/menuselect-deps

@@ -0,0 +1,52 @@
+ASOUND=1
+CRYPTO=1
+CURL=1
+DAHDI=1
+FREETDS=1
+GMIME=1
+GNU_LD=1
+GSM=1
+GTK2=1
+GTK=0
+H323=0
+HOARD=0
+ICONV=1
+IKSEMEL=1
+IMAP_TK=1
+ISDNNET=0
+IXJUSER=1
+JACK=1
+LDAP=1
+LTDL=1
+LUA=0
+MISDN=0
+NBS=0
+NETSNMP=0
+NEWT=1
+OGG=1
+OPENH323=0
+OSPTK=1
+OSSAUDIO=1
+PGSQL=1
+POPT=1
+PORTAUDIO=1
+PRI=0
+RESAMPLE=0
+AIS=0
+RADIUS=1
+SPANDSP=0
+SPEEX=1
+SPEEXDSP=1
+SPEEX_PREPROCESS=1
+SQLITE3=1
+SQLITE=1
+SS7=0
+SSL=1
+SUPPSERV=0
+TONEZONE=1
+UNIXODBC=1
+USB=1
+VORBIS=1
+VPBAPI=0
+WINARCH=0
+ZLIB=1