Bump vectorscan to 5.4.8

Brings good stuff like
- https://github.com/VectorCamp/vectorscan/pull/119
- https://github.com/VectorCamp/vectorscan/pull/118

contrib/vectorscan

@@ -1 +1 @@
-Subproject commit 73695e419c27af7fe2a099c7aa57931cc02aea5d
+Subproject commit f6250ae3e5a3085000239313ad0689cc1e00cdc2

contrib/vectorscan-cmake/CMakeLists.txt

@@ -249,11 +249,6 @@ elseif (ARCH_AARCH64)
         "${LIBRARY_DIR}/../vectorscan-cmake/rageled_files/aarch64/Parser.cpp"
         "${LIBRARY_DIR}/../vectorscan-cmake/rageled_files/aarch64/control_verbs.cpp"
     )
-    set_source_files_properties(
-        "${LIBRARY_DIR}/../vectorscan-cmake/rageled_files/aarch64/Parser.cpp"
-        "${LIBRARY_DIR}/../vectorscan-cmake/rageled_files/aarch64/control_verbs.cpp"
-        COMPILE_FLAGS -Wno-c++11-narrowing
-    )
 endif()
 
 # Platform-dependent files
@@ -304,7 +299,7 @@ target_include_directories (_vectorscan SYSTEM PUBLIC "${LIBRARY_DIR}/src")
 # Please regenerate these files if you update vectorscan.
 
 if (ARCH_AMD64)
-    target_include_directories (_vectorscan PRIVATE x86_64)
+    target_include_directories (_vectorscan PRIVATE amd64)
 endif ()
 
 if (ARCH_AARCH64)