Certain vendors support large number of uniform buffer components.
The calculation of maxCombinedUniformComponents overflows when
captured in a 32bit lvalue. Update it to a 64bit variable.

Bug: angleproject:4788
Tests: dEQP-GLES3.functional.state_query.integers64.max_combined*
Change-Id: I355910218c56347c98a5dfa7359b00be7b40871a
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2264849
Commit-Queue: Mohan Maiya <m.maiya@samsung.com>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>