Add a utils.h file that contains common functions
The new header contains common information across various mbed TLS
modules and avoids code duplication. To start, utils.h currently only
contains the mbedtls_zeroize() function.
diff --git a/library/Makefile b/library/Makefile
index 0333815..46dce4e 100644
--- a/library/Makefile
+++ b/library/Makefile
@@ -65,7 +65,8 @@
ripemd160.o rsa_internal.o rsa.o \
sha1.o sha256.o sha512.o \
threading.o timing.o version.o \
- version_features.o xtea.o
+ version_features.o xtea.o \
+ utils.o
OBJS_X509= certs.o pkcs11.o x509.o \
x509_create.o x509_crl.o x509_crt.o \