cpu/esp32: fixes LINKFLAGS in Makfile.include

This commit adds the ESP32 vendor libraries for WLAN to the BASELIBS variable. This avoids having to define an additional archive group in the LINKGFLAGS variable which contains these vendor libraries and again RIOT module archive files with the symbols that are refered by these vendor libraries.

cpu/esp32/Makefile.include

@@ -118,28 +118,13 @@ endif
 
 LINKFLAGS += -L$(ESP32_SDK_DIR)/components/esp32
 LINKFLAGS += -L$(ESP32_SDK_DIR)/components/esp32/lib
-LINKFLAGS += -Wl,--start-group
 
 ifneq (,$(filter esp_wifi_any,$(USEMODULE)))
-    LINKFLAGS += $(BINDIR)/cpu.a
-    LINKFLAGS += $(BINDIR)/esp_idf.a
-    LINKFLAGS += $(BINDIR)/esp_idf_esp32.a
-    LINKFLAGS += $(BINDIR)/esp_idf_nvs_flash.a
-    LINKFLAGS += $(BINDIR)/esp_idf_spi_flash.a
-    LINKFLAGS += $(BINDIR)/pthread.a
-    LINKFLAGS += $(BINDIR)/riot_freertos.a
-    LINKFLAGS += $(BINDIR)/xtimer.a
-    LINKFLAGS += -lcore -lrtc -lnet80211 -lpp -lsmartconfig -lcoexist
-    LINKFLAGS += -lwps -lwpa -lwpa2 -lespnow -lmesh -lphy -lstdc++
-endif
-
-ifneq (,$(filter pthread,$(USEMODULE)))
-    LINKFLAGS += $(BINDIR)/core.a
-    LINKFLAGS += $(BINDIR)/pthread.a
+    BASELIBS += -lcore -lrtc -lnet80211 -lpp -lsmartconfig -lcoexist
+    BASELIBS += -lwps -lwpa -lwpa2 -lespnow -lmesh -lphy -lstdc++
 endif
 
 LINKFLAGS += -lhal -lg -lc -lg
-LINKFLAGS += -Wl,--end-group
 LINKFLAGS += -L$(RIOTCPU)/$(CPU)/ld/
 LINKFLAGS += -T$(RIOTCPU)/$(CPU)/ld/esp32.ld
 LINKFLAGS += -T$(RIOTCPU)/$(CPU)/ld/esp32.common.ld