arm64/build: Add missing DWARF sections

Explicitly include DWARF sections when they're present in the build.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20200821194310.3089815-13-keescook@chromium.org

arch/arm64/kernel/vmlinux.lds.S

@@ -239,6 +239,7 @@ SECTIONS
 	_end = .;
 
 	STABS_DEBUG
+	DWARF_DEBUG
 	ELF_DETAILS
 
 	HEAD_SYMBOLS