fix gyp build on linux

Author: zhangJP

ChangeLog

@@ -16,3 +16,5 @@
 2014-08-13:
     Fix crash bug for path clip.
 
+2014-10-22:
+    Fix gyp build on linux system.

autogen.sh

@@ -1,3 +1,5 @@
 #!/bin/sh
 
 ./tools/gyp/gyp --depth=./ picasso.gyp --generator-output=proj
+echo "\n"
+echo "Please change dir to \"proj\" and type \"make\" or \"make BUILDTYPE=Release\""

build_android.sh

@@ -578,7 +578,7 @@
           ],
           'libraries': [
             '-lfreetype',
-            '-lz `pkg-config --libs gtk+-2.0`',
+            '-lz -lpthread `pkg-config --libs gtk+-2.0`',
           ],
         }],
       ],

build_proj.sh

@@ -36,6 +36,8 @@ void stop_worker_threads(void)
 {
     pthread_cancel(th1);
     pthread_cancel(th2);
+    pthread_join(th1, 0);
+    pthread_join(th2, 0);
 }
 
 void loop_wait(int ms)