cmake: minor cleanup in CMake's options definitions

Author: lukaszstolarczuk

CMakeLists.txt

@@ -69,13 +69,13 @@ option(BUILD_TESTS "build tests" ON)
 option(BUILD_DOC "build documentation" ON)
 option(BUILD_BENCHMARKS "build benchmarks" ON)
 
-option(COVERAGE "run coverage test" OFF)
+option(COVERAGE "enable collecting of coverage data" OFF)
 option(DEVELOPER_MODE "enable developer checks" OFF)
 option(CHECK_CPP_STYLE "check code style of C++ sources" OFF)
 option(TRACE_TESTS "more verbose test outputs" OFF)
 option(USE_ASAN "enable AddressSanitizer (debugging)" OFF)
 option(USE_UBSAN "enable UndefinedBehaviorSanitizer (debugging)" OFF)
-option(USE_CCACHE "Use ccache if it is available in the system" ON)
+option(USE_CCACHE "use ccache if it is available in the system" ON)
 
 option(TESTS_USE_FORCED_PMEM "run tests with PMEM_IS_PMEM_FORCE=1 - it speeds up tests execution on emulated pmem" OFF)
 option(TESTS_USE_VALGRIND "enable tests with valgrind (fail build if Valgrind not found)" ON)