Disable building svnlite(1) by default.

Now that all repositories have switched to git, initiate the de-orbit
burn for svnlite(1).

Reviewed by:	emaste
MFC after:	1 month
Relnotes:	yes
Differential Revision:	https://reviews.freebsd.org/D30105

share/mk/src.opts.mk

@@ -173,7 +173,6 @@ __DEFAULT_YES_OPTIONS = \
     SOURCELESS_HOST \
     SOURCELESS_UCODE \
     STATS \
-    SVNLITE \
     SYSCONS \
     SYSTEM_COMPILER \
     SYSTEM_LINKER \
@@ -213,6 +212,7 @@ __DEFAULT_NO_OPTIONS = \
     RPCBIND_WARMSTART_SUPPORT \
     SORT_THREADS \
     SVN \
+    SVNLITE \
     ZONEINFO_LEAPSECONDS_SUPPORT \
 
 # LEFT/RIGHT. Left options which default to "yes" unless their corresponding