cmake2meson: strip comments from statements

Without this change, the following correct cmake will cause an error:

statement(
    arg1
    # arg2
    arg3
)

tools/cmake2meson.py

@@ -120,7 +120,10 @@ class Parser:
             args.append(self.arguments())
             self.expect('rparen')
         arg = self.current
-        if self.accept('string') \
+        if self.accept('comment'):
+            rest = self.arguments()
+            args += rest
+        elif self.accept('string') \
                 or self.accept('varexp') \
                 or self.accept('id'):
             args.append(arg)