maybe fix mac build.

  1 warning generated.
  external/sepolicy/tools/sepolicy-analyze.c:446:27: error: implicit declaration of function 'isspace' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
          while (p < end && isspace(*p))
                          ^
  1 error generated.
  make: *** [out/host/darwin-x86/obj32/EXECUTABLES/sepolicy-analyze_intermediates/sepolicy-analyze.o] Error 1
  make: *** Waiting for unfinished jobs....

Change-Id: I250dcef7c726d5b66835dc51c057e472b801aa2c

tools/sepolicy-analyze.c

@@ -12,6 +12,7 @@
 #include <sepol/policydb/expand.h>
 #include <sepol/policydb/util.h>
 #include <stdbool.h>
+#include <ctype.h>
 
 static int debug;
 static int warn;