Newer Ubuntu systems tend to not provide a libGLESv1_CM.so.1 anymore. As
we're not required to have a GLESv1 implementation (only a few older
Android apps are using GLESv1) we can as easy fix avoid loading a real
GLESv1 implementation and assign dummy functions instead to all relevant
GLESv1 API calls. In the future we want to switch to a GLESv1->GLESv2
translator as the Android emulator does.
This will make the *.entries files the the authoritative place to
define additional GL function prototypes. All generated header
files are now placed inside the build directory so that nobody
will ever try to touch them again.
Make sure helper libraries get built as static libs regardless
of the cmake version being used.
This fixes issue 217.
Signed-off-by: Bernhard Rosenkränzer <bero@lindev.ch>
