libs: Avoid exposing -Wl,--version-script to other built library

$(SHLIB_LDFLAGS) is used by more targets that the single targets that
except it (libxenfoo.so.X.Y). There is also some dynamic libraries in
stats/ that uses $(SHLIB_LDFLAGS) (even if those are never built), and
there's libxenlight_test.so which doesn't needs a version script.

Also, libxenlight_test.so might failed to build if the version script
doesn't exist yet.

For these reasons, avoid changing the generic $(SHLIB_LDFLAGS) flags,
and add the flag directly on the command line.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Release-acked-by: Henry Wang <Henry.Wang@arm.com>

tools/libs/libs.mk

@@ -12,8 +12,6 @@ MAJOR := $(shell $(XEN_ROOT)/version.sh $(XEN_ROOT)/xen/Makefile)
 endif
 MINOR ?= 0
 
-SHLIB_LDFLAGS += -Wl,--version-script=libxen$(LIBNAME).map
-
 CFLAGS   += -Wmissing-prototypes
 CFLAGS   += $(CFLAGS_xeninclude)
 CFLAGS   += $(foreach lib, $(USELIBS_$(LIBNAME)), $(CFLAGS_libxen$(lib)))
@@ -85,7 +83,7 @@ lib$(LIB_FILE_NAME).so.$(MAJOR): lib$(LIB_FILE_NAME).so.$(MAJOR).$(MINOR)
 	$(SYMLINK_SHLIB) $< $@
 
 lib$(LIB_FILE_NAME).so.$(MAJOR).$(MINOR): $(PIC_OBJS) libxen$(LIBNAME).map
-	$(CC) $(LDFLAGS) $(PTHREAD_LDFLAGS) -Wl,$(SONAME_LDFLAG) -Wl,lib$(LIB_FILE_NAME).so.$(MAJOR) $(SHLIB_LDFLAGS) -o $@ $(PIC_OBJS) $(LDLIBS) $(APPEND_LDFLAGS)
+	$(CC) $(LDFLAGS) $(PTHREAD_LDFLAGS) -Wl,$(SONAME_LDFLAG) -Wl,lib$(LIB_FILE_NAME).so.$(MAJOR) -Wl,--version-script=libxen$(LIBNAME).map $(SHLIB_LDFLAGS) -o $@ $(PIC_OBJS) $(LDLIBS) $(APPEND_LDFLAGS)
 
 # If abi-dumper is available, write out the ABI analysis
 ifneq ($(ABI_DUMPER),)