cmake: `--build` and `--install` error out when encountering bad flags

Source/cmakemain.cxx

Tests/RunCMake/CommandLine/RunCMakeTest.cmake

...nCMake/CommandLine/build-invalid-target-syntax-result.txt

...nCMake/CommandLine/build-invalid-target-syntax-stderr.txt

...unCMake/CommandLine/build-unknown-command-long-result.txt

...unCMake/CommandLine/build-unknown-command-long-stderr.txt

...ommandLine/build-unknown-command-partial-match-result.txt

...ommandLine/build-unknown-command-partial-match-stderr.txt

...nCMake/CommandLine/build-unknown-command-short-result.txt

...nCMake/CommandLine/build-unknown-command-short-stderr.txt

...CMake/CommandLine/install-unknown-command-long-result.txt

...CMake/CommandLine/install-unknown-command-long-stderr.txt

...Make/CommandLine/install-unknown-command-short-result.txt

...Make/CommandLine/install-unknown-command-short-stderr.txt