editors/imhex: Fix build with llvm15

editors/imhex/files/patch-lib_external_pattern__language_lib_CMakeLists.txt

+--- lib/external/pattern_language/lib/CMakeLists.txt.orig	2023-02-12 13:35:48 UTC
++++ lib/external/pattern_language/lib/CMakeLists.txt
+@@ -34,7 +34,7 @@ add_library(libpl ${LIBRARY_TYPE}
+         source/pl/lib/std/hash.cpp
+ )
+ 
+-target_compile_options(libpl PRIVATE -Wall -Wextra -Werror -Wpedantic -Wno-unknown-pragmas)
++target_compile_options(libpl PRIVATE -Wall -Wextra -Werror -Wpedantic -Wno-unknown-pragmas -Wno-error=deprecated-declarations)
+ 
+ target_include_directories(libpl PUBLIC include)
+ target_link_libraries(libpl PRIVATE fmt::fmt-header-only)