Rename project in CMake

TODO: to create symlinks to the old names!
diff --git a/programs/random/CMakeLists.txt b/programs/random/CMakeLists.txt
index ae02bd1..30933d8 100644
--- a/programs/random/CMakeLists.txt
+++ b/programs/random/CMakeLists.txt
@@ -1,11 +1,11 @@
 add_executable(gen_random_havege gen_random_havege.c)
-target_link_libraries(gen_random_havege polarssl)
+target_link_libraries(gen_random_havege mbedtls)
 
 add_executable(gen_random_ctr_drbg gen_random_ctr_drbg.c)
-target_link_libraries(gen_random_ctr_drbg polarssl)
+target_link_libraries(gen_random_ctr_drbg mbedtls)
 
 add_executable(gen_entropy gen_entropy.c)
-target_link_libraries(gen_entropy polarssl)
+target_link_libraries(gen_entropy mbedtls)
 
 install(TARGETS gen_random_havege gen_random_ctr_drbg gen_entropy
         DESTINATION "bin"