Add missing includes on android

* Thanks to @Themaister for this fix

renderdoc/os/posix/android/android_hook.cpp

@@ -29,6 +29,7 @@
 
 #include <android/dlext.h>
 #include <dlfcn.h>
+#include <errno.h>
 #include <jni.h>
 #include <link.h>
 #include <stddef.h>

renderdoccmd/renderdoccmd_android.cpp

@@ -24,6 +24,7 @@
 
 #include "renderdoccmd.h"
 #include <EGL/egl.h>
+#include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
 #include <dlfcn.h>
 #include <locale.h>