Fix indentation in config.m4 sources

Author: jmikola

config.m4

@@ -187,92 +187,92 @@ if test "$MONGODB" != "no"; then
   ";
 
   YAJL_SOURCES="\
-	yajl_version.c \
-	yajl.c \
-	yajl_encode.c \
-	yajl_lex.c \
-	yajl_parser.c \
-	yajl_buf.c \
-	yajl_tree.c \
-	yajl_alloc.c \
-	yajl_gen.c
+    yajl_version.c \
+    yajl.c \
+    yajl_encode.c \
+    yajl_lex.c \
+    yajl_parser.c \
+    yajl_buf.c \
+    yajl_tree.c \
+    yajl_alloc.c \
+    yajl_gen.c
   ";
 
   BSON_SOURCES="\
-	bcon.c \
-	bson.c \
-	bson-atomic.c \
-	bson-clock.c \
-	bson-context.c \
-	bson-error.c \
-	bson-iter.c \
-	bson-iso8601.c \
-	bson-json.c \
-	bson-keys.c \
-	bson-md5.c \
-	bson-memory.c \
-	bson-oid.c \
-	bson-reader.c \
-	bson-string.c \
-	bson-timegm.c \
-	bson-utf8.c \
-	bson-value.c \
-	bson-version.c \
-	bson-writer.c
+    bcon.c \
+    bson.c \
+    bson-atomic.c \
+    bson-clock.c \
+    bson-context.c \
+    bson-error.c \
+    bson-iter.c \
+    bson-iso8601.c \
+    bson-json.c \
+    bson-keys.c \
+    bson-md5.c \
+    bson-memory.c \
+    bson-oid.c \
+    bson-reader.c \
+    bson-string.c \
+    bson-timegm.c \
+    bson-utf8.c \
+    bson-value.c \
+    bson-version.c \
+    bson-writer.c
   ";
   MONGOC_SOURCES="\
-	mongoc-array.c \
-        mongoc-async.c \
-        mongoc-async-cmd.c \
-	mongoc-buffer.c \
-	mongoc-bulk-operation.c \
-	mongoc-b64.c \
-	mongoc-client.c \
-	mongoc-client-pool.c \
-	mongoc-cluster.c \
-	mongoc-collection.c \
-	mongoc-counters.c \
-	mongoc-cursor.c \
-	mongoc-cursor-array.c \
-	mongoc-cursor-transform.c \
-	mongoc-cursor-cursorid.c \
-	mongoc-database.c \
-	mongoc-init.c \
-	mongoc-gridfs.c \
-	mongoc-gridfs-file.c \
-	mongoc-gridfs-file-page.c \
-	mongoc-gridfs-file-list.c \
-	mongoc-index.c \
-	mongoc-list.c \
-	mongoc-log.c \
-	mongoc-matcher-op.c \
-	mongoc-matcher.c \
-        mongoc-opcode.c \
-	mongoc-queue.c \
-	mongoc-read-prefs.c \
-	mongoc-rpc.c \
-        mongoc-set.c \
-        mongoc-server-description.c \
-	mongoc-socket.c \
-	mongoc-stream.c \
-	mongoc-stream-buffered.c \
-	mongoc-stream-file.c \
-	mongoc-stream-gridfs.c \
-	mongoc-stream-socket.c \
-        mongoc-topology.c \
-        mongoc-topology-scanner.c \
-        mongoc-topology-description.c \
-	mongoc-uri.c \
-	mongoc-util.c \
-	mongoc-write-command.c \
-	mongoc-write-concern.c
+    mongoc-array.c \
+    mongoc-async.c \
+    mongoc-async-cmd.c \
+    mongoc-buffer.c \
+    mongoc-bulk-operation.c \
+    mongoc-b64.c \
+    mongoc-client.c \
+    mongoc-client-pool.c \
+    mongoc-cluster.c \
+    mongoc-collection.c \
+    mongoc-counters.c \
+    mongoc-cursor.c \
+    mongoc-cursor-array.c \
+    mongoc-cursor-transform.c \
+    mongoc-cursor-cursorid.c \
+    mongoc-database.c \
+    mongoc-init.c \
+    mongoc-gridfs.c \
+    mongoc-gridfs-file.c \
+    mongoc-gridfs-file-page.c \
+    mongoc-gridfs-file-list.c \
+    mongoc-index.c \
+    mongoc-list.c \
+    mongoc-log.c \
+    mongoc-matcher-op.c \
+    mongoc-matcher.c \
+    mongoc-opcode.c \
+    mongoc-queue.c \
+    mongoc-read-prefs.c \
+    mongoc-rpc.c \
+    mongoc-set.c \
+    mongoc-server-description.c \
+    mongoc-socket.c \
+    mongoc-stream.c \
+    mongoc-stream-buffered.c \
+    mongoc-stream-file.c \
+    mongoc-stream-gridfs.c \
+    mongoc-stream-socket.c \
+    mongoc-topology.c \
+    mongoc-topology-scanner.c \
+    mongoc-topology-description.c \
+    mongoc-uri.c \
+    mongoc-util.c \
+    mongoc-write-command.c \
+    mongoc-write-concern.c
   ";
 
 MONGOC_SOURCES_SSL="\
-	mongoc-rand.c \
-	mongoc-scram.c \
-	mongoc-stream-tls.c \
-	mongoc-ssl.c
+    mongoc-rand.c \
+    mongoc-scram.c \
+    mongoc-stream-tls.c \
+    mongoc-ssl.c
   ";
 
 MONGOC_SOURCES_SASL=mongoc-sasl.c