libjxl: Use -Og instead of -O2 with clang-19

This is a workaround until [1] is fixed

[1] llvm/llvm-project#108262

Signed-off-by: Khem Raj <raj.khem@gmail.com>

conf/nonclangable.conf

@@ -662,3 +662,7 @@ LDFLAGS:append:pn-bluez5:toolchain-clang = "${@bb.utils.contains('DISTRO_FEATURE
 
 LD:pn-gnu-efi:toolchain-clang = "${@bb.utils.contains('DISTRO_FEATURES', 'ld-is-lld', '${HOST_PREFIX}ld.bfd${TOOLCHAIN_OPTIONS} ${HOST_LD_ARCH}', '${HOST_PREFIX}ld${TOOLCHAIN_OPTIONS} ${HOST_LD_ARCH}', d)}"
 TOOLCHAIN:pn-perf = "gcc"
+
+# See https://github.com/llvm/llvm-project/issues/108262
+SELECTED_OPTIMIZATION:remove:pn-libjxl:arm:toolchain-clang = "-O2"
+SELECTED_OPTIMIZATION:append:pn-libjxl:arm:toolchain-clang = " -Og"