Fix for Bug 1371 - avoid generating OpenVG stub functions with invalid IMPORT_C decorations
LET = LEave Test-framework
fl: a cpp filelist
fl (dir1)?
let: main testframework
let -f cpp_file_list -o log_dir
let --std-in -o log_dir
logdiff: print the changes between to log dir
logdiff log_dir_1 log_dir_2