Remove NDEBUG for tests.

A great deal of checks in tests are performed using asserts, which
get stripped in release builds, when NDEBUG is defined. To facilitate
testing release builds, undefine NDEBUG for all tests.

Refs https://github.com/resiprocate/resiprocate/issues/423.

build/cmake_modules/Utilities.cmake

@@ -15,6 +15,8 @@ endfunction()
 function(test_base target)
    add_executable(${target} ${ARGN})
    add_test(NAME ${target} COMMAND $<TARGET_FILE:${target}>)
+   # Don't strip asserts in release builds
+   target_compile_options(${target} PRIVATE -UNDEBUG)
    set_tests_properties(${target} PROPERTIES TIMEOUT 300)
 endfunction()