package/sunxi-mali: fix conflicting data types between GLES2/gl2.h and GLES/gl.h

When OpenGL ES 1.1 and OpenGL ES 2.0 are used at the same time, the
build fail since GLintptr and GLsizeiptr data type are not the same in
GLES2/gl2.h and GLES/gl.h.

Also sync the data type of GLbyte, GLubyte, GLfloat, GLclampf and
GLfixed.

Fixes:
http://autobuild.buildroot.net/results/258/25898b45cefde9661d8ac87dd84bc883bb5283d1



Signed-off-by: Romain Naour <romain.naour@gmail.com>
Cc: Spenser Gilliland <spenser@gillilanding.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>