gbuild: MSVC: invoke MSASM with /safeseh

BinScope complains that the sblo.dll lacks SAFESEH flag.

Change-Id: If2b4b6592eac37542c3e2745d90a8e432b8da2e2

solenv/gbuild/platform/com_MSC_class.mk

@@ -95,7 +95,7 @@ define gb_AsmObject__command
 $(call gb_Output_announce,$(2),$(true),ASM,3)
 $(call gb_Helper_abbreviate_dirs,\
 	mkdir -p $(dir $(1)) $(dir $(4)) && \
-	"$(ML_EXE)" /c /Cp $(gb_AFLAGS) -D$(COM) /Fo$(1) $(3)) && \
+	"$(ML_EXE)" /safeseh /c /Cp $(gb_AFLAGS) -D$(COM) /Fo$(1) $(3)) && \
 	echo "$(1) : $(3)" > $(4)
 endef