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/receiver/gsm_clock_offset_control.block.yml b/grc/receiver/gsm_clock_offset_control.block.yml
new file mode 100644
index 0000000..abb52bc
--- /dev/null
+++ b/grc/receiver/gsm_clock_offset_control.block.yml
@@ -0,0 +1,35 @@
+# auto-generated by grc.converter
+
+id: gsm_clock_offset_control
+label: GSM Clock Offset Control
+
+parameters:
+-   id: fc
+    label: fc
+    dtype: float
+    default: fc
+-   id: osr
+    label: OSR
+    dtype: int
+    default: osr
+-   id: samp_rate
+    label: samp_rate
+    dtype: float
+    default: samp_rate
+
+inputs:
+-   domain: message
+    id: measurements
+
+outputs:
+-   domain: message
+    id: ctrl
+    optional: true
+
+templates:
+    imports: import grgsm
+    make: grgsm.clock_offset_control(${fc}, ${samp_rate}, ${osr})
+    callbacks:
+    - set_fc(${fc})
+
+file_format: 1