external-arm-toolchain: ignore warnings about 32-bit time types

Functions that take 32-bit time_t types are unavoidable in the libc, so
ignore the warnings.

Signed-off-by: Ross Burton <ross.burton@arm.com>
Reviewed-by: Denys Dmytriyenko <denis@denix.org>
Signed-off-by: Jon Mason <jon.mason@arm.com>

meta-arm-toolchain/recipes-devtools/external-arm-toolchain/external-arm-toolchain.bb

@@ -316,6 +316,7 @@ PACKAGES += "\
 	${PN}-staticdev \
 "
 
+INSANE_SKIP += " 32bit-time"
 INSANE_SKIP:${PN}-dbg = "staticdev"
 INSANE_SKIP:${PN}-utils += "ldflags"
 INSANE_SKIP:libstdc++ += "ldflags"