Revert "tools/cmake: Update to 3.14.0"

The cmake bump to 3.14.0 breaks build on all targets. Revert it for now.

This reverts commit a3446257a8.

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>

tools/cmake/patches/130-bootstrap_parallel_make_flag.patch

@@ -1,6 +1,6 @@
 --- a/bootstrap
 +++ b/bootstrap
-@@ -1168,7 +1168,10 @@ int main(){ printf("1%c", (char)0x0a); r
+@@ -1164,7 +1164,10 @@ int main(){ printf("1%c", (char)0x0a); r
  ' > "test.c"
  cmake_original_make_flags="${cmake_make_flags}"
  if [ "x${cmake_parallel_make}" != "x" ]; then