Consistently use the name tinycrypt over uecc

We called in tinycrypt in the file names, but uecc in config.h, all.sh and
other places, which could be confusing. Just use tinycrypt everywhere because
that's the name of the project and repo where we took the files.

The changes were made using the following commands (with GNU sed and zsh):

sed -i 's/uecc/tinycrypt/g' **/*.[ch] tests/scripts/all.sh
sed -i 's/MBEDTLS_USE_UECC/MBEDTLS_USE_TINYCRYPT/g' **/*.[ch] tests/scripts/all.sh scripts/config.pl
diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index d43d478..62b22a6 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -1030,16 +1030,16 @@
     make test
 }
 
-component_build_uecc_cmake () {
-    msg "build: uecc native, cmake"
-    scripts/config.pl set MBEDTLS_USE_UECC
+component_build_tinycrypt_cmake () {
+    msg "build: tinycrypt native, cmake"
+    scripts/config.pl set MBEDTLS_USE_TINYCRYPT
     CC=gcc cmake .
     make
 }
 
-component_build_uecc_make () {
-    msg "build: uecc native, make"
-    scripts/config.pl set MBEDTLS_USE_UECC
+component_build_tinycrypt_make () {
+    msg "build: tinycrypt native, make"
+    scripts/config.pl set MBEDTLS_USE_TINYCRYPT
     make CC=gcc CFLAGS='-Werror -O1'
 }
 
@@ -1138,10 +1138,10 @@
     armc6_build_test "--target=aarch64-arm-none-eabi -march=armv8.2-a"
 }
 
-component_build_armcc_uecc_baremetal () {
-    msg "build: ARM Compiler 5, make with uecc and baremetal"
+component_build_armcc_tinycrypt_baremetal () {
+    msg "build: ARM Compiler 5, make with tinycrypt and baremetal"
     scripts/config.pl baremetal
-    scripts/config.pl set MBEDTLS_USE_UECC
+    scripts/config.pl set MBEDTLS_USE_TINYCRYPT
 
     make CC="$ARMC5_CC" AR="$ARMC5_AR" WARNING_CFLAGS='--strict --c99' lib
     make clean