No glu.h in OpenGL ES for iOS

Change-Id: Ie0eb1f68d997c4f2bd37c9d7c2ff6feccbc7b8ce

external/glew/UnpackedTarball_glew.mk

@@ -15,6 +15,7 @@ $(eval $(call gb_UnpackedTarball_set_patchlevel,glew,0))
 
 $(eval $(call gb_UnpackedTarball_fix_end_of_line,glew,\
 	Makefile \
+	include/GL/glew.h \
 ))
 
 ifeq ($(OS)$(COM),WNTMSC)
@@ -35,6 +36,12 @@ $(eval $(call gb_UnpackedTarball_add_patches,glew,\
 ))
 endif
 
+ifeq ($(OS),IOS)
+$(eval $(call gb_UnpackedTarball_add_patches,glew,\
+	external/glew/glew-ios.patch.1 \
+))
+endif
+
 ifeq ($(DISABLE_DYNLOADING),TRUE)
 $(eval $(call gb_UnpackedTarball_add_patches,glew,\
 	external/glew/glew-static-only.patch.1 \

external/glew/glew-ios.patch.1

+-*- Mode:Diff -*-
+--- glew/include/GL/glew.h
++++ glew/include/GL/glew.h
+@@ -1180,6 +1180,10 @@
+ 
+ /* ---------------------------------- GLU ---------------------------------- */
+ 
++#if !defined(GLEW_NO_GLU) && defined(__APPLE__) && defined(__IPHONE_OS_VERSION_MIN_REQUIRED)
++#define GLEW_NO_GLU
++#endif
++
+ #ifndef GLEW_NO_GLU
+ /* this is where we can safely include GLU */
+ #  if defined(__APPLE__) && defined(__MACH__)