DM: fix typo in cplay express boards.txt

Author: deanm1278

boards.txt

@@ -154,7 +154,7 @@ adafruit_circuitplayground_m0.build.vid=0x239A
 adafruit_circuitplayground_m0.build.pid=0x8018
 adafruit_circuitplayground_m0.bootloader.tool=openocd
 adafruit_circuitplayground_m0.bootloader.file=circuitplay/circuitplay_m0_samd21g18_sam_ba.bin
-adafruit_circuitplayground_m0.compiler.arm.cmsis.ldflags="-L{runtime.tools.CMSIS-4.5.0.path}/CMSIS/Lib/GCC/" -larm_cortexM0lf_math
+adafruit_circuitplayground_m0.compiler.arm.cmsis.ldflags="-L{runtime.tools.CMSIS-4.5.0.path}/CMSIS/Lib/GCC/" -larm_cortexM0l_math
 
 
 # Adafruit Metro M4 (SAMD51)