Keep last git hash in globals for better debugging

src/shellfu.sh.skel

 #
 SHELLFU_EMBEDDED=${SHELLFU_EMBEDDED:-false}
 
+#
+# Last git commit hash before build
+#
+SHELLFU_GIT_HASH=__MKIT_PROJ_GIT_LASTHASH__
+
 #
 # Colon-separated list of already imported modules
 #
             shellfu __debug "SHELLFU_DEBUG_EXCLUDE='$SHELLFU_DEBUG_EXCLUDE'"
             shellfu __debug "SHELLFU_EMBEDDED='$SHELLFU_EMBEDDED'"
             shellfu __debug "SHELLFU_EMBEDTMP='$SHELLFU_EMBEDTMP'"
+            shellfu __debug "SHELLFU_GIT_HASH='$SHELLFU_GIT_HASH'"
             shellfu __debug "SHELLFU_IMPORTED='$SHELLFU_IMPORTED'"
             shellfu __debug "SHELLFU_INCLUDE='$SHELLFU_INCLUDE'"
             shellfu __debug "SHELLFU_PATH='$SHELLFU_PATH'"

tests/shellfu_import/TF_RUN

     echo SHELLFU_EMBEDDED
     echo SHELLFU_EMBEDTMP
     echo SHELLFU_DIR
+    echo SHELLFU_GIT_HASH
     echo SHELLFU_IMPORTED
     echo SHELLFU_INCLUDE
     echo SHELLFU_PATH