tools/cmake: update to 3.18.2

Update cmake to version 3.18.2.
Refresh patches.

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>

tools/cmake/patches/120-curl-fix-libressl-linking.patch

@@ -20,10 +20,10 @@ Signed-off-by: Jo-Philipp Wich <jo@mein.io>
 ---
 --- a/Utilities/cmcurl/CMakeLists.txt
 +++ b/Utilities/cmcurl/CMakeLists.txt
-@@ -459,6 +459,14 @@ if(CMAKE_USE_OPENSSL)
+@@ -488,6 +488,14 @@ if(CMAKE_USE_OPENSSL)
+   endif()
+   set(SSL_ENABLED ON)
    set(USE_OPENSSL ON)
-   set(HAVE_LIBCRYPTO ON)
-   set(HAVE_LIBSSL ON)
 +  check_library_exists("rt" clock_gettime "" HAVE_LIBRT)
 +  if(HAVE_LIBRT)
 +    list(APPEND OPENSSL_LIBRARIES rt)