build: minor tweaks for speeding up the configure phase #509
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Only the C language is used unless we are building the ASAN or UBSAN build variants. Only check for the C language support, enabling C++ support in the case that the build type is one of those two.
Restructure the file layout to place the custom modules into the
cmake/modules
directory that is the common layout for CMake based projects.While a generally unimportant optimization, it makes it much more clear what is being checked and why and does reduce the configure time by ~10% (.25s) on Windows.