pointer-auth-link-with-c: Fix cross compilation.

Author: pcc

tests/run-make/pointer-auth-link-with-c/Makefile

@@ -5,10 +5,10 @@ include ../tools.mk
 all:
 	$(COMPILE_OBJ) $(TMPDIR)/test.o test.c
 	$(AR) rcs $(TMPDIR)/libtest.a $(TMPDIR)/test.o
-	$(RUSTC) -Z branch-protection=bti,pac-ret,leaf test.rs
+	$(RUSTC) --target $(TARGET) -Z branch-protection=bti,pac-ret,leaf test.rs
 	$(call RUN,test)
 
 	$(COMPILE_OBJ) $(TMPDIR)/test.o test.c -mbranch-protection=bti+pac-ret+leaf
 	$(AR) rcs $(TMPDIR)/libtest.a $(TMPDIR)/test.o
-	$(RUSTC) -Z branch-protection=bti,pac-ret,leaf test.rs
+	$(RUSTC) --target $(TARGET) -Z branch-protection=bti,pac-ret,leaf test.rs
 	$(call RUN,test)