misc: refactor cmake scripts to support gcov

[neverchanje]

we refactor several places on cmake scripts to make the whole building process much simpler:

• remove WARNING_ALL option, because whatever the value is, it always add -Wall flag.

• remove scripts/linux/misc.sh, this is useless.

• don't generate .matchfile, useless.

• remove MY_PROJ_BINDIRS argument, useless.

• don't install useless stuff in rdsn/bin to rdsn/builder/output

• extract the installation process to dsn_install_library and dsn_install_executable, remove MY_DO_INSTALL argument, which makes things complicated.

• Formerly we had a unfinished support for gcov, however we used lcov to generate report. lcov is useful but it is an old tool and compared to gcovr, it's not convenient enough. Now I change our tool to gcovr, which do everything only in one statement.

• unset CMAKE_RUNTIME_OUTPUT_DIRECTORY, CMAKE_ARCHIVE_OUTPUT_DIRECTORY and CMAKE_LIBRARY_OUTPUT_DIRECTORY. The problem is, when test executable, dsn_nfs_test for example, is copied to builder/bin/dsn_nfs_test (by CMAKE_RUNTIME_OUTPUT_DIRECTORY), gcovr can not find the corresponding *.gcno file because they are not in the same directory.
  More specifically, dsn_nfs_test is in builder/bin/dsn_nfs_test, while main.cpp.gcno is in builder/src/dist/nfs/test/CMakeFiles/dsn_nfs_test.dir. gcovr failed to find gcno file of dsn_nfs_test in builder/bin/dsn_nfs_test so it generated empty result for it.
  To fix this we make builder/bin/dsn_nfs_test a soft link to builder/src/dist/nfs/test, and it works now.

[qinzuoyan]

good job, looks nice to me