LibCore: Add a small library with only ArgsParser for DynamicLoader

This will be used in the DynamicLoader code, as it can't do syscalls via
LibCore code.
Because we can't use most of the LibCore code, we convert the versioning
code in Version.cpp to use LibC uname() function.

Userland/Libraries/LibCore/CMakeLists.txt

@@ -17,6 +17,13 @@ set(SOURCES
 serenity_lib(LibCoreMinimal coreminimal)
 target_link_libraries(LibCoreMinimal PRIVATE LibSystem)
 
+if (SERENITYOS)
+    add_library(DynamicLoader_LibCoreArgsParser 
+        ArgsParser.cpp
+        Version.cpp)
+    target_link_libraries(DynamicLoader_LibCoreArgsParser PUBLIC DynamicLoader_CompileOptions)
+endif()
+
 set(SOURCES
     AnonymousBuffer.cpp
     Command.cpp

Userland/Libraries/LibCore/Version.cpp

@@ -5,18 +5,24 @@
  */
 
 #include <AK/String.h>
-#include <LibCore/System.h>
 #include <LibCore/Version.h>
 
+#ifdef AK_OS_SERENITY
+#    include <sys/utsname.h>
+#endif
+
 namespace Core::Version {
 
 ErrorOr<String> read_long_version_string()
 {
 #ifdef AK_OS_SERENITY
-    auto uname = TRY(Core::System::uname());
-
-    auto const* version = uname.release;
-    auto const* git_hash = uname.version;
+    struct utsname uts;
+    int rc = uname(&uts);
+    if ((rc) < 0) {
+        return Error::from_syscall("uname"sv, rc);
+    }
+    auto const* version = uts.release;
+    auto const* git_hash = uts.version;
 
     return String::formatted("Version {} revision {}", version, git_hash);
 #else