Correct which versions can support the extensions GL_ARB_separate_shader_objects and GL_ARB_shading_language_420pack.  They'd only gone back to 150, rather than 130/140.

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@25314 e7fa87d3-cd2b-0410-9028-fcbf551c1848