[MTS_DRAGONFLY_F411RE][MTS_MDOT_F411RE] add explicit seek() call when combining bootloader and application binaries so Windows builds succeed

Author: mfiore02

workspace_tools/targets.py

@@ -734,6 +734,7 @@ def combine_bins(t_self, resources, elf, binf):
         part.close()
         outbin.seek(0, 0)
         data = outbin.read()
+        outbin.seek(0, 1)
         crc = struct.pack('<I', binascii.crc32(data) & 0xFFFFFFFF)
         outbin.write(crc)
         outbin.close()
@@ -774,6 +775,7 @@ def combine_bins(t_self, resources, elf, binf):
         part.close()
         outbin.seek(0, 0)
         data = outbin.read()
+        outbin.seek(0, 1)
         crc = struct.pack('<I', binascii.crc32(data) & 0xFFFFFFFF)
         outbin.write(crc)
         outbin.close()