fix race condition when generating linker scripts

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libc/Makefile.in

@@ -66,13 +66,14 @@ $(libc.depend): $(libc_OUT)/libc.oS $(libc-nomulti-y:.o=.oS) | $(LIBS-libc.so)
 	$(call linkm.so,$(libc_FULL_NAME),$(ABI_VERSION))
 endif
 	$(Q)$(RM) $@
-	$(Q)cp $(top_srcdir)extra/scripts/format.lds $@
+	$(Q)cat $(top_srcdir)extra/scripts/format.lds > $@.tmp
-	$(Q)$(OUTPUT_FORMAT) >> $@
+	$(Q)$(OUTPUT_FORMAT) >> $@.tmp
 ifeq ($(COMPAT_ATEXIT),y)
-	$(Q)echo "GROUP ( $(NONSHARED_LIBNAME) $(SHARED_LIBNAME) $(ASNEEDED) )" >> $@
+	$(Q)echo "GROUP ( $(NONSHARED_LIBNAME) $(SHARED_LIBNAME) $(ASNEEDED) )" >> $@.tmp
 else
-	$(Q)echo "GROUP ( $(SHARED_LIBNAME) $(NONSHARED_LIBNAME) $(ASNEEDED) )" >> $@
+	$(Q)echo "GROUP ( $(SHARED_LIBNAME) $(NONSHARED_LIBNAME) $(ASNEEDED) )" >> $@.tmp
 endif
+	$(Q)mv $@.tmp $@
 
 $(libc_OUT)/libc_so.a: $(libc-so-y) | $(top_builddir)lib/libc.a $(top_builddir)lib/$(NONSHARED_LIBNAME)
 	$(Q)$(RM) $@

libpthread/linuxthreads/Makefile.in

@@ -94,8 +94,9 @@ $(top_builddir)lib/libpthread.so: $(libpthread_OUT)/libpthread_so.a $(libc.depen
 #	$(call linkm.so,$(libpthread_FULL_NAME),$(ABI_VERSION))
 #endif
 	$(Q)$(RM) $@
-	$(Q)cp $(top_srcdir)extra/scripts/format.lds $@
+	$(Q)cat $(top_srcdir)extra/scripts/format.lds > $@.tmp
-	$(Q)echo "GROUP ( $(notdir $@).$(ABI_VERSION) libpthread_nonshared.a )" >> $@
+	$(Q)echo "GROUP ( $(notdir $@).$(ABI_VERSION) libpthread_nonshared.a )" >> $@.tmp
+	$(Q)mv $@.tmp $@
 
 ifeq ($(PTHREADS_DEBUG_SUPPORT),y)
 $(libpthread_OUT)/libpthread_so.a: STRIP_FLAGS:=$(STRIP_FLAGS:-x=-X --strip-debug)