Test with 32-bit and 64-bit bignum limbs on all architectures

Build with MBEDTLS_HAVE_INT32 and MBEDTLS_HAVE_INT64 on all
architectures, not just x86_64. These two modes should work on all
platforms (except embedded environments where 64-bit division is not
available).

Also run the unit tests.

Correct the description: this is not "N-bit compilation", but "N-bit
bignum limbs".
diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index ccec60f..d5fc12d 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -662,24 +662,30 @@
 
     msg "test: 64-bit ILP32, make, gcc"
     make test
-
-    msg "build: gcc, force 32-bit compilation"
-    cleanup
-    cp "$CONFIG_H" "$CONFIG_BAK"
-    scripts/config.pl unset MBEDTLS_HAVE_ASM
-    scripts/config.pl unset MBEDTLS_AESNI_C
-    scripts/config.pl unset MBEDTLS_PADLOCK_C
-    make CC=gcc CFLAGS='-Werror -Wall -Wextra -DMBEDTLS_HAVE_INT32'
-
-    msg "build: gcc, force 64-bit compilation"
-    cleanup
-    cp "$CONFIG_H" "$CONFIG_BAK"
-    scripts/config.pl unset MBEDTLS_HAVE_ASM
-    scripts/config.pl unset MBEDTLS_AESNI_C
-    scripts/config.pl unset MBEDTLS_PADLOCK_C
-    make CC=gcc CFLAGS='-Werror -Wall -Wextra -DMBEDTLS_HAVE_INT64'
 fi # x86_64
 
+msg "build: gcc, force 32-bit bignum limbs"
+cleanup
+cp "$CONFIG_H" "$CONFIG_BAK"
+scripts/config.pl unset MBEDTLS_HAVE_ASM
+scripts/config.pl unset MBEDTLS_AESNI_C
+scripts/config.pl unset MBEDTLS_PADLOCK_C
+make CC=gcc CFLAGS='-Werror -Wall -Wextra -DMBEDTLS_HAVE_INT32'
+
+msg "test: gcc, force 32-bit bignum limbs"
+make test
+
+msg "build: gcc, force 64-bit bignum limbs"
+cleanup
+cp "$CONFIG_H" "$CONFIG_BAK"
+scripts/config.pl unset MBEDTLS_HAVE_ASM
+scripts/config.pl unset MBEDTLS_AESNI_C
+scripts/config.pl unset MBEDTLS_PADLOCK_C
+make CC=gcc CFLAGS='-Werror -Wall -Wextra -DMBEDTLS_HAVE_INT64'
+
+msg "test: gcc, force 64-bit bignum limbs"
+make test
+
 msg "build: arm-none-eabi-gcc, make" # ~ 10s
 cleanup
 cp "$CONFIG_H" "$CONFIG_BAK"