Fix spurious * in regex

`grep mbedtls_des*` would pick up e.g. mbedtls_derive_xxx.

Signed-off-by: Gilles Peskine <[email protected]>

tests/scripts/all.sh

@@ -2140,7 +2140,7 @@ component_test_psa_crypto_config_accel_cipher () {
     loc_accel_flags="$loc_accel_flags $( echo "$loc_accel_list" | sed 's/[^ ]* */-DMBEDTLS_PSA_ACCEL_&/g' )"
     make CFLAGS="$ASAN_CFLAGS -Werror -I../tests/include -I../tests -DPSA_CRYPTO_DRIVER_TEST -DMBEDTLS_TEST_LIBTESTDRIVER1 $loc_accel_flags" LDFLAGS="-ltestdriver1 $ASAN_CFLAGS"
 
-    not grep mbedtls_des* library/des.o
+    not grep mbedtls_des library/des.o
 
     msg "test: MBEDTLS_PSA_CRYPTO_CONFIG with accelerated hash"
     make test