gbuild: fix "missing separator" errors with --enable-crashdump

Add missing backslash in com_MSC_class.mk.
Thanks to Julien Nabet for finding this problem.
(regression from 85b6a93c)

Change-Id: Iaae670c58e42bc22691b141495598276fa23bf02

solenv/gbuild/platform/com_MSC_class.mk

@@ -239,7 +239,7 @@ $(if $(filter $(gb_MERGEDLIBS),$(1)),,\
 $(call gb_Library_add_auxtarget,$(1),$(OUTDIR)/bin/$(notdir $(3))))
 
 ifneq ($(ENABLE_CRASHDUMP),)
-$(call gb_Library_add_auxtargets,$(1),
+$(call gb_Library_add_auxtargets,$(1),\
 		$(OUTDIR)/bin/$(notdir $(patsubst %.dll,%.pdb,$(3))) \
 		$(OUTDIR)/bin/$(notdir $(patsubst %.dll,%.ilk,$(3))) \
 )