Migrate grc blocks from xml to yaml

Convert the blocks using cmdline_converter.py script from
https://gist.githubusercontent.com/haakov/4228ff6a14486641add538483093e86b/raw/c861a840e31182ace2e74f5425e356cb4f8b183a/cmdline_converter.py

Change-Id: Iee5c611a2e100bd2fdf487611a867dc937d8c292
diff --git a/grc/CMakeLists.txt b/grc/CMakeLists.txt
index ae06065..deee6e0 100644
--- a/grc/CMakeLists.txt
+++ b/grc/CMakeLists.txt
@@ -26,5 +26,5 @@
 add_subdirectory(transmitter)
 add_subdirectory(trx)
 install(FILES
-    gsm_block_tree.xml DESTINATION share/gnuradio/grc/blocks
+    gsm.tree.yml DESTINATION share/gnuradio/grc/blocks
 )