ProfileViewer: Fix opening the kernel image

The kernel image is now at /boot/Kernel (not /boot/kernel), so adjust
the paths accordingly.

DevTools/ProfileViewer/DisassemblyModel.cpp

@@ -72,7 +72,7 @@ DisassemblyModel::DisassemblyModel(Profile& profile, ProfileNode& node)
 {
     String path;
     if (m_node.address() >= 0xc0000000)
-        path = "/boot/kernel";
+        path = "/boot/Kernel";
     else
         path = profile.executable_path();
     m_file = make<MappedFile>(path);

DevTools/ProfileViewer/Profile.cpp

@@ -188,7 +188,7 @@ OwnPtr<Profile> Profile::load_from_perfcore_file(const StringView& path)
 
     auto elf_loader = ELF::Loader::create(static_cast<const u8*>(elf_file.data()), elf_file.size());
 
-    MappedFile kernel_elf_file("/boot/kernel");
+    MappedFile kernel_elf_file("/boot/Kernel");
     RefPtr<ELF::Loader> kernel_elf_loader;
     if (kernel_elf_file.is_valid())
         kernel_elf_loader = ELF::Loader::create(static_cast<const u8*>(kernel_elf_file.data()), kernel_elf_file.size());