toolchain/helpers.mk: fix 'unsupported' typo

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

toolchain/helpers.mk

@@ -324,7 +324,7 @@ check_arm_abi = \
 	__CROSS_CC=$(strip $1) ; \
 	EXT_TOOLCHAIN_TARGET=`LANG=C $${__CROSS_CC} -v 2>&1 | grep ^Target | cut -f2 -d ' '` ; \
 	if ! echo $${EXT_TOOLCHAIN_TARGET} | grep -qE 'eabi(hf)?$$' ; then \
-		echo "External toolchain uses the unsuported OABI" ; \
+		echo "External toolchain uses the unsupported OABI" ; \
 		exit 1 ; \
 	fi ; \
 	if ! echo 'int main(void) {}' | $${__CROSS_CC} -x c -o $(BUILD_DIR)/.br-toolchain-test.tmp - ; then \