Update SConscript

bsp/stm32/stm32l4r5-st-nucleo/applications/SConscript

 from building import *
 
 cwd     = GetCurrentDir()
-src     = Glob('*.c')
-CPPPATH = [str(Dir('#')), cwd]
+src     = Glob('*.c') + Glob('*.cpp')
+CPPPATH = [cwd]
 
 group = DefineGroup('Applications', src, depend = [''], CPPPATH = CPPPATH)