Kernel: Support loading the kernel at almost arbitrary virtual addresses

This enables further work on implementing KASLR by adding relocation
support to the pre-kernel and updating the kernel to be less dependent
on specific virtual memory layouts.

Kernel/Prekernel/CMakeLists.txt

@@ -4,6 +4,7 @@ set(SOURCES
     init.cpp
     UBSanitizer.cpp
     ../MiniStdLib.cpp
+    ../../Userland/Libraries/LibELF/Relocation.cpp
 )
 
 if ("${SERENITY_ARCH}" STREQUAL "i686")
@@ -12,6 +13,8 @@ else()
     set(PREKERNEL_TARGET Prekernel64)
 endif()
 
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -static")
+
 add_executable(${PREKERNEL_TARGET} ${SOURCES})
 target_compile_options(${PREKERNEL_TARGET} PRIVATE -no-pie -fno-pic)