tests/: Add CMocka unit-test infrastructure

This adds the CMocka unit-testing infrastructure into
the meson build system which we will latter follow up
with unit-tests for flashrom's core logic.

BUG=b:157280555
BRANCH=none
TEST=builds

Change-Id: I66665f56627b3d99049176bfbebbd771b080370a
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/41622
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

tests/meson.build

@@ -0,0 +1,28 @@
+root_includes = include_directories('../subprojects')
+
+srcs = [
+  'tests.c',
+]
+
+mocks = [
+  '-Wl,--wrap=physunmap',
+  '-Wl,--wrap=physmap',
+  '-Wl,--gc-sections',
+]
+
+flashrom_tests = executable('flashrom_unit_tests',
+  srcs,
+  include_directories : root_includes,
+  c_args : [
+    cargs,
+    '-ffunction-sections',
+    '-fdata-sections',
+    #    '-DSTANDALONE',
+    '-DCONFIG_DEFAULT_PROGRAMMER=PROGRAMMER_DUMMY',
+    '-DCONFIG_DEFAULT_PROGRAMMER_ARGS=""',
+  ],
+  export_dynamic : true,
+  link_args : mocks,
+  dependencies : [cmocka_dep, flashrom_test_dep],
+)
+test('cmocka test flashrom', flashrom_tests)