cpu/esp32: bootloader versions with and w/o colors

For the implementation of the colored log output, two versions of the bootloader are introduced, one version with colored log output and one version without colors.

cpu/esp32/Makefile.include

@@ -134,6 +134,12 @@ ifeq ($(QEMU), 1)
     CFLAGS += -DQEMU
 endif
 
+ifneq (,$(filter esp_log_color,$(USEMODULE)))
+    BOOTLOADER_BIN = bootloader_with_colors.bin
+else
+    BOOTLOADER_BIN = bootloader_without_colors.bin
+endif
+
 # LINKFLAGS += -Wl,--verbose
 
 LINKFLAGS += -L$(ESP32_SDK_DIR)/components/esp32
@@ -185,7 +191,7 @@ ifeq ($(QEMU), 1)
     FLASHER = dd
     FFLAGS += if=/dev/zero bs=1M count=4  | tr "\\000" "\\377" > tmp.bin && cat tmp.bin |
     FFLAGS += head -c $$((0x1000)) |
-    FFLAGS += cat - $(RIOTCPU)/$(CPU)/bin/bootloader.bin tmp.bin |
+    FFLAGS += cat - $(RIOTCPU)/$(CPU)/bin/$(BOOTLOADER_BIN) tmp.bin |
     FFLAGS += head -c $$((0x8000)) |
     FFLAGS += cat - $(BINDIR)/partitions.bin tmp.bin |
     FFLAGS += head -c $$((0x10000)) |
@@ -199,7 +205,7 @@ else
     FFLAGS += --chip esp32 -p $(PROG_DEV) -b $(PROGRAMMER_SPEED)
     FFLAGS += --before default_reset --after hard_reset write_flash
     FFLAGS += -z -fm $(FLASH_MODE) -fs detect -ff $(FLASH_FREQ)
-    FFLAGS += 0x1000 $(RIOTCPU)/$(CPU)/bin/bootloader.bin
+    FFLAGS += 0x1000 $(RIOTCPU)/$(CPU)/bin/$(BOOTLOADER_BIN)
     FFLAGS += 0x8000 $(BINDIR)/partitions.bin
     FFLAGS += 0x10000 $(FLASHFILE).bin
 endif