update SConscript: support scons 3.

bsp/CME_M7/CMSIS/SConscript

@@ -16,9 +16,9 @@ if rtconfig.CROSS_TOOL == 'gcc':
 elif rtconfig.CROSS_TOOL == 'keil':
     src += ['CME_M7/startup/arm/startup_cmem7.s']
 elif rtconfig.CROSS_TOOL == 'iar':
-    print '================ERROR============================'
-    print 'Not support IAR yet!'
-    print '================================================='
+    print('================ERROR============================')
+    print('Not support IAR yet!')
+    print('=================================================')
     exit(0)
 
 path = [cwd + '/CME_M7']

bsp/gd32450z-eval/Libraries/SConscript

@@ -11,9 +11,9 @@ src += [cwd + '/CMSIS/GD/GD32F4xx/Source/system_gd32f4xx.c']
 
 #add for startup script
 if rtconfig.CROSS_TOOL == 'gcc':
-    print '================================================='
-    print 'Not support gcc yet!'
-    print '================================================='
+    print('=================================================')
+    print('Not support gcc yet!')
+    print('=================================================')
     exit(0)
 elif rtconfig.CROSS_TOOL == 'keil':
     src += [cwd + '/CMSIS/GD/GD32F4xx/Source/ARM/startup_gd32f4xx.s']

bsp/lpc824/Libraries/SConscript

@@ -12,7 +12,7 @@ src += Glob('common/chip/*.c')
 
 # add for startup script 
 if rtconfig.CROSS_TOOL == 'gcc':
-    print "not gcc startup file"
+    print("not gcc startup file")
     exit(0)
 elif rtconfig.CROSS_TOOL == 'keil':
     src += [cwd + '/common/startup/keil_startup_lpc82x.s']

components/external/cairo/SConscript

@@ -6,9 +6,9 @@ CAIRO_PATH = 'cairo-' + CAIRO_VERSION
 cwd = GetCurrentDir()
 
 if GetDepend('RT_USING_CAIRO') and not os.path.exists(CAIRO_PATH):
-    print '================ERROR============================'
-    print 'Please get cairo dist and put them under cairo folder'
-    print '================================================='
+    print('================ERROR============================')
+    print('Please get cairo dist and put them under cairo folder')
+    print('=================================================')
     exit(0)
 
 # source files 

components/external/ftk/SConscript

@@ -8,9 +8,9 @@ if os.path.isfile(os.path.join(RTT_ROOT, 'components', 'external', 'ftk',
     objs = SConscript('ftk/src/os/rt-thread/SConscript')
 else:
     if GetDepend('RT_USING_FTK'):
-        print '================ERROR============================'
-        print 'Please get ftk file and put them under ftk folder'
-        print '================================================='
+        print('================ERROR============================')
+        print('Please get ftk file and put them under ftk folder')
+        print('=================================================')
         exit(0)
 
     objs = []

components/external/pixman/SConscript

@@ -8,9 +8,9 @@ PIXMAN_VERSION = '0.21.6'
 PIXMAN_PATH = 'pixman-' + PIXMAN_VERSION
 
 if GetDepend('RT_USING_CAIRO') and not os.path.exists(PIXMAN_PATH):
-    print '================ERROR============================'
-    print 'Please get pixman dist and put them under pixman folder'
-    print '================================================='
+    print('================ERROR============================')
+    print('Please get pixman dist and put them under pixman folder')
+    print('=================================================')
     exit(0)
 
 # core source files