Forces a specific libdir for c-ares (#2241)

The c-ares build expects lib/libcares.a to exist after cmake, but on my system it was being generated in lib64.  This simply sets the cmake variable so that the target ends up where we expect.

Makefile

@@ -569,7 +569,11 @@ c-ares:
 	rm -rf $(BUN_DEPS_DIR)/c-ares/build && \
 	mkdir $(BUN_DEPS_DIR)/c-ares/build && \
 	cd $(BUN_DEPS_DIR)/c-ares/build && \
-    cmake $(CMAKE_FLAGS) -DCMAKE_C_FLAGS="$(CFLAGS) -flto=full" -DCMAKE_BUILD_TYPE=Release -DCARES_STATIC=ON -DCARES_STATIC_PIC=ON -DCARES_SHARED=OFF -G "Ninja" .. && \
+    cmake $(CMAKE_FLAGS) -DCMAKE_C_FLAGS="$(CFLAGS) -flto=full" \
+        -DCMAKE_BUILD_TYPE=Release \
+        -DCMAKE_INSTALL_LIBDIR=lib \
+        -DCARES_STATIC=ON -DCARES_STATIC_PIC=ON -DCARES_SHARED=OFF \
+        -G "Ninja" .. && \
 	ninja && cp lib/libcares.a $(BUN_DEPS_OUT_DIR)/libcares.a
 
 .PHONY: prepare-types