sigrok-cross-linux: run configure under scan-build, too http://clang-analyzer.llvm.org/scan-build.html#recommended_autoconf suggests that autotools generated configure scripts shall be run under scan-build, too. Adjust the cross build script accordingly (N.B. the initial cmake invocation at configure time already did so).
sigrok-cross-linux: Add file for simple Linux (cross-)compiles. This script can be adjusted to build the sigrok components for various Linux-based targets via various cross-toolchains. Per default it will do native builds though, i.e. it can also be used just as a simple "I don't want to type that much" script to clone, build, and install (e.g. in $HOME/sr) all sigrok components in one go.