vcomp: Add .seh annotations for x86_64.

dlls/vcomp/main.c

@@ -157,13 +157,18 @@ __ASM_GLOBAL_FUNC( _vcomp_fork_call_wrapper,
 extern void CDECL _vcomp_fork_call_wrapper(void *wrapper, int nargs, __ms_va_list args);
 __ASM_GLOBAL_FUNC( _vcomp_fork_call_wrapper,
                    "pushq %rbp\n\t"
+                   __ASM_SEH(".seh_pushreg %rbp\n\t")
                    __ASM_CFI(".cfi_adjust_cfa_offset 8\n\t")
                    __ASM_CFI(".cfi_rel_offset %rbp,0\n\t")
                    "movq %rsp,%rbp\n\t"
+                   __ASM_SEH(".seh_setframe %rbp,0\n\t")
                    __ASM_CFI(".cfi_def_cfa_register %rbp\n\t")
                    "pushq %rsi\n\t"
+                   __ASM_SEH(".seh_pushreg %rsi\n\t")
                    __ASM_CFI(".cfi_rel_offset %rsi,-8\n\t")
                    "pushq %rdi\n\t"
+                   __ASM_SEH(".seh_pushreg %rdi\n\t")
+                   __ASM_SEH(".seh_endprologue\n\t")
                    __ASM_CFI(".cfi_rel_offset %rdi,-16\n\t")
                    "movq %rcx,%rax\n\t"
                    "movq $4,%rcx\n\t"