Allow recompiling libfsp with different target folder

Author: facchinm

extras/e2studioProjects/Santiago/fsp_to_arduino.sh

@@ -2,6 +2,9 @@
 
 CORE_PATH=$(pwd -P)/../../../
 TARGET=UNOWIFIR4
+if [ $1 != "" ]; then
+TARGET=$1
+fi
 
 # this part changes the makefile generated by e2studio (removing ra_gen from the build)
 # then it cleans the build and re-build all again