Merge pull request #14 from sdroege/master

Load eglIntOpenMAXILDoneMarker() explicitely via dlsym()  instead of having a stub in libEGL and libbcm_host
Avoid unitialialised variable warning
Attach the process when calling platform_tls_get_check() the first time too

Similar as to what is done in platform_tls_get() already. This
fixes heap corruption when calling eglGetDisplay() before
any function calling platform_tls_get() is called.

https://github.com/raspberrypi/firmware/issues/112
https://github.com/raspberrypi/firmware/issues/99