Modify the script suffix .s to .S

bsp/smartfusion2/CMSIS/SConscript

@@ -5,7 +5,7 @@ cwd = GetCurrentDir()
 src	= Glob('*.c')
 
 if rtconfig.CROSS_TOOL == 'gcc':
-    src += ['startup_gcc/startup_m2sxxx.s']
+    src += ['startup_gcc/startup_m2sxxx.S']
     
 elif rtconfig.CROSS_TOOL == 'keil':
     src += ['startup_arm/startup_m2sxxx.s']