kbuild: fix typo in modpost

Reported by a Fedora user when they tried to build some out of tree module..

Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost
index a495502..0a64688 100644
--- a/scripts/Makefile.modpost
+++ b/scripts/Makefile.modpost
@@ -40,7 +40,7 @@
 include scripts/Makefile.lib
 
 kernelsymfile := $(objtree)/Module.symvers
-modulesymfile := $(KBUILD_EXTMOD)/Modules.symvers
+modulesymfile := $(KBUILD_EXTMOD)/Module.symvers
 
 # Step 1), find all modules listed in $(MODVERDIR)/
 __modules := $(sort $(shell grep -h '\.ko' /dev/null $(wildcard $(MODVERDIR)/*.mod)))