Minor infrastructure changes, to simplify an upcoming check in:

- print out block member types when printing a block (makes all test results change)
 - const versions of all intermediate.h type-identification methods
 - layoutSlotLocation -> layoutLocation

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@24664 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Test/baseResults/constFold.frag.out

@@ -262,7 +262,7 @@ ERROR: node is still EOpNull!
 0:?     'out11' (out 4-component vector of float)
 0:?     'out12' (out 2-component vector of int)
 0:?     'out13' (out 3-component vector of uint)
-0:?     's' (const structure{v3,iv2,m})
+0:?     's' (const structure{3-component vector of float v3, 2-component vector of int iv2, 2X4 matrix of float m})
 0:?       3.000000
 0:?       3.000000
 0:?       3.000000