clang-format: run clang-format on C/C++ code

Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>

examples/hellomraa.c

@@ -29,7 +29,7 @@
 #include "mraa.h"
 
 int
-main(int argc, char **argv)
+main(int argc, char** argv)
 {
     char* board_name = mraa_get_platform_name();