Revert "e - fix major memory bloat when in gl mode - dont create shm segments"
Revert "e - fix major memory bloat when in gl mode - dont create shm segments"

This reverts commit ae6e09ec11aebdce47aba0e18d8aad0368c2f101.

This breaks resizing of windows inside Enlightenment. Evas_Engines
don't bind a pixmap permanently, they just bind during each render, so
on resize this caused a broken pixmap if we don't create a new one for
each size. This patch Would be correct IF engines worked differently
wrt x pixmap binding during render.

tasn/enlightenment,tasn/enlightenment,tasn/enlightenment