uvision exporter: Escape double quote in flags.

Without this fix macro defined as -DFOO="BAR" won't be correctly handled
by uvision.

Author: pan-

tools/export/uvision/__init__.py

@@ -166,7 +166,7 @@ def format_flags(self):
         # Flag is invalid if set in template
         # Optimizations are also set in the template
         invalid_flag = lambda x: x in template or re.match("-O(\d|time)", x) 
-        flags['c_flags'] = [flag for flag in c_flags if not invalid_flag(flag)]
+        flags['c_flags'] = [flag.replace('"','\\"') for flag in c_flags if not invalid_flag(flag)]
         flags['c_flags'] = " ".join(flags['c_flags'])
         return flags