fluent-bit: add support for lua filter

this allows us to add custom records, for example, for converting
kernel monotonic timestamps to UTC format timestamps

fluent-bit/Makefile

@@ -55,7 +55,7 @@ CMAKE_OPTIONS+= \
 	-DFLB_BACKTRACE=No \
 	-DFLB_KAFKA=No \
 	-DFLB_WASM=No \
-	-DFLB_LUAJIT=No
+	-DFLB_LUAJIT=Yes
 
 # In plugins
 CMAKE_OPTIONS += \
@@ -103,10 +103,10 @@ CMAKE_OPTIONS += \
 
 # Filter options
 CMAKE_OPTIONS += \
+	-DFLB_FILTER_LUA=Yes \
 	-DFLB_FILTER_AWS=No \
 	-DFLB_FILTER_ECS=No \
 	-DFLB_FILTER_KUBERNETES=No \
-	-DFLB_FILTER_LUA=No \
 	-DFLB_FILTER_NEST=No \
 	-DFLB_FILTER_RECORD_MODIFIER=No \
 	-DFLB_FILTER_THROTTLE=No \

fluent-bit/patches/0003-fix_luajit_compile_error.patch

@@ -0,0 +1,24 @@
+diff --git a/lib/luajit-cmake/LuaJIT.cmake b/lib/luajit-cmake/LuaJIT.cmake
+index 4ad1ef565..c0dee5830 100644
+--- a/lib/luajit-cmake/LuaJIT.cmake
++++ b/lib/luajit-cmake/LuaJIT.cmake
+@@ -426,10 +426,17 @@ execute_process(
+   OUTPUT_STRIP_TRAILING_WHITESPACE
+ )
+ 
+-if (GIT_EXISTENCE EQUAL 0)
++execute_process(
++  COMMAND git rev-parse --is-inside-work-tree
++  RESULT_VARIABLE GIT_IN_REPOSITORY
++  OUTPUT_VARIABLE GIT_IS_IN_REPOSITORY
++  OUTPUT_STRIP_TRAILING_WHITESPACE
++)
++
++if ((GIT_EXISTENCE EQUAL 0) AND (GIT_IN_REPOSITORY EQUAL 0))
+   message(STATUS "Using Git: ${GIT_VERSION}")
+   add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/luajit_relver.txt
+-    COMMAND git show -s --format=${GIT_FORMAT} > ${CMAKE_CURRENT_BINARY_DIR}/luajit_relver.txt
++    COMMAND git -c log.showSignature=false show -s --format=${GIT_FORMAT} > ${CMAKE_CURRENT_BINARY_DIR}/luajit_relver.txt
+     WORKING_DIRECTORY ${LUAJIT_DIR}
+   )
+ else()