ESSL 1.0: Add GL_FRAGMENT_PRECISION_HIGH to ESSL 1.0.  It was in desktop, and properly not in ES 3.0, but missing in ES 1.0.


git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@25175 e7fa87d3-cd2b-0410-9028-fcbf551c1848