make: Trim IDF_VER to fit a 32-bit field

Closes: https://github.com/espressif/esp-idf/issues/3131

make/project.mk

@@ -270,10 +270,11 @@ endif
 
 # If we have `version.txt` then prefer that for extracting IDF version
 ifeq ("$(wildcard ${IDF_PATH}/version.txt)","")
-IDF_VER := $(shell cd ${IDF_PATH} && git describe --always --tags --dirty)
+IDF_VER_T := $(shell cd ${IDF_PATH} && git describe --always --tags --dirty)
 else
-IDF_VER := `cat ${IDF_PATH}/version.txt`
+IDF_VER_T := `cat ${IDF_PATH}/version.txt`
 endif
+IDF_VER := $(shell echo "$(IDF_VER_T)"  | cut -c 1-31)
 
 # Set default LDFLAGS
 EXTRA_LDFLAGS ?=