引数の誤りを変更

Dependencies:   mbed HMC5883L_2

Revision:
0:26409a44f1f3
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Wed Feb 06 11:54:51 2019 +0000
@@ -0,0 +1,1 @@
+https://os.mbed.com/users/mbed_official/code/mbed/builds/5aab5a7997ee
\ No newline at end of file