Bug 1948642 - Include Flow.cpp also when MOZ_GECKO_PROFILER is not defined r=jrmuizel

Thanks to Petr Sumbera for filing the issue and recommending the fix!

Differential Revision: https://phabricator.services.mozilla.com/D240167

mozglue/baseprofiler/moz.build

@@ -15,7 +15,6 @@ if CONFIG["MOZ_GECKO_PROFILER"]:
         "public/BaseProfilingStack.h",
     ]
     UNIFIED_SOURCES += [
-        "core/Flow.cpp",
         "core/PageInformation.cpp",
         "core/platform.cpp",
         "core/ProfileBuffer.cpp",
@@ -115,6 +114,7 @@ EXPORTS.mozilla += [
 
 UNIFIED_SOURCES += [
     "core/BaseAndGeckoProfilerDetail.cpp",
+    "core/Flow.cpp",
     "core/ProfilerUtils.cpp",
 ]