Sync from upstream llama.cpp repository

scripts/xxd.cmake

@@ -0,0 +1,16 @@
+# CMake equivalent of `xxd -i ${INPUT} ${OUTPUT}`
+# Usage: cmake -DINPUT=tools/server/public/index.html -DOUTPUT=tools/server/index.html.hpp -P scripts/xxd.cmake
+
+SET(INPUT "" CACHE STRING "Input File")
+SET(OUTPUT "" CACHE STRING "Output File")
+
+get_filename_component(filename "${INPUT}" NAME)
+string(REGEX REPLACE "\\.|-" "_" name "${filename}")
+
+file(READ "${INPUT}" hex_data HEX)
+string(REGEX REPLACE "([0-9a-f][0-9a-f])" "0x\\1," hex_sequence "${hex_data}")
+
+string(LENGTH ${hex_data} hex_len)
+math(EXPR len "${hex_len} / 2")
+
+file(WRITE "${OUTPUT}" "unsigned char ${name}[] = {${hex_sequence}};\nunsigned int ${name}_len = ${len};\n")