dbghelp: Simplify the resort operation (module address table) by using binary insertion instead of resorting the whole array.

dbghelp: when (re)building the per module symbol table (lookup by address), no longer iterate over the hash table.

Directly add to the table when adding a new symbol.

Based on a patch by Rob Shearman.

Previously every texture that was flagged for NP2 fixup used a vec2
uniform in the shader to store texture dimensions.  Turns out that the
GLSL compilers just maps vec2 to vec4, so essentially wasting 2
floats. The new code only uses vec4 uniforms but packs dimensions info
of 2 textures into a single uniform.