test: enable RSA library test on sandbox

We want to always run RSA library test on sandbox build in Travis CI.
Just adding CONFIG_RSA_VERIFY_WITH_PKEY would be good enough for this
purpose.
Signed-off-by: NAKASHI Takahiro <takahiro.akashi@linaro.org>

configs/sandbox64_defconfig

@@ -200,6 +200,7 @@ CONFIG_WDT_SANDBOX=y
 CONFIG_FS_CBFS=y
 CONFIG_FS_CRAMFS=y
 CONFIG_CMD_DHRYSTONE=y
+CONFIG_RSA_VERIFY_WITH_PKEY=y
 CONFIG_TPM=y
 CONFIG_LZ4=y
 CONFIG_ERRNO_STR=y

configs/sandbox_defconfig

@@ -226,6 +226,7 @@ CONFIG_WDT_SANDBOX=y
 CONFIG_FS_CBFS=y
 CONFIG_FS_CRAMFS=y
 CONFIG_CMD_DHRYSTONE=y
+CONFIG_RSA_VERIFY_WITH_PKEY=y
 CONFIG_TPM=y
 CONFIG_LZ4=y
 CONFIG_ERRNO_STR=y

configs/sandbox_flattree_defconfig

@@ -175,6 +175,7 @@ CONFIG_VIDEO_SANDBOX_SDL=y
 CONFIG_OSD=y
 CONFIG_SANDBOX_OSD=y
 CONFIG_CMD_DHRYSTONE=y
+CONFIG_RSA_VERIFY_WITH_PKEY=y
 CONFIG_TPM=y
 CONFIG_LZ4=y
 CONFIG_ERRNO_STR=y

configs/sandbox_spl_defconfig

@@ -198,6 +198,7 @@ CONFIG_FS_CBFS=y
 CONFIG_FS_CRAMFS=y
 # CONFIG_SPL_USE_TINY_PRINTF is not set
 CONFIG_CMD_DHRYSTONE=y
+CONFIG_RSA_VERIFY_WITH_PKEY=y
 CONFIG_TPM=y
 CONFIG_LZ4=y
 CONFIG_ERRNO_STR=y