api-ms-win-core-rtlsupport-l1-1-0: Add missing forwards.

dlls/api-ms-win-core-rtlsupport-l1-1-0/api-ms-win-core-rtlsupport-l1-1-0.spec

+@ cdecl -arch=arm,x86_64 RtlAddFunctionTable(ptr long long) ntdll.RtlAddFunctionTable
 @ stdcall -norelay RtlCaptureContext(ptr) ntdll.RtlCaptureContext
 @ stdcall RtlCaptureStackBackTrace(long long ptr ptr) ntdll.RtlCaptureStackBackTrace
+@ stdcall RtlCompareMemory(ptr ptr long) ntdll.RtlCompareMemory
+@ stdcall -arch=x86_64 RtlCopyMemory(ptr ptr long) ntdll.RtlCopyMemory
+@ cdecl -arch=arm,x86_64 RtlDeleteFunctionTable(ptr) ntdll.RtlDeleteFunctionTable
 @ stdcall RtlFillMemory(ptr long long) ntdll.RtlFillMemory
+@ cdecl -arch=x86_64 RtlInstallFunctionTableCallback(long long long ptr ptr wstr) ntdll.RtlInstallFunctionTableCallback
+@ stdcall -arch=arm,x86_64 RtlLookupFunctionEntry(long ptr ptr) ntdll.RtlLookupFunctionEntry
+@ stdcall RtlPcToFileHeader(ptr ptr) ntdll.RtlPcToFileHeader
+@ stdcall -register RtlRaiseException(ptr) ntdll.RtlRaiseException
+@ stdcall -arch=x86_64 RtlRestoreContext(ptr ptr) ntdll.RtlRestoreContext
 @ stdcall -register RtlUnwind(ptr ptr ptr ptr) ntdll.RtlUnwind
+@ stdcall -arch=x86_64 RtlUnwindEx(ptr ptr ptr ptr ptr ptr) ntdll.RtlUnwindEx
+@ stdcall -arch=x86_64 RtlVirtualUnwind(long long long ptr ptr ptr ptr ptr) ntdll.RtlVirtualUnwind